ANNEX IV
                                                                              TO
                                                             SECURITIES PURCHASE
                                                                       AGREEMENT

                          REGISTRATION RIGHTS AGREEMENT

                  THIS REGISTRATION RIGHTS AGREEMENT, dated as of April 30, 1999
(this "Agreement"),  is made by and between U.S. Wireless Data, Inc., a Colorado
corporation  (the  "Company"),  and the each entity named on the signature  page
hereto  (individually  referred to as the "Initial  Investor"  and  collectively
referred to as the "Initial Investors").

                              W I T N E S S E T H:

                  WHEREAS,  upon the terms and subject to the  conditions of the
Securities Purchase  Agreement,  dated as of April 30, 1999, between the Initial
Investors  and the Company (the  "Securities  Purchase  Agreement";  capitalized
terms not otherwise  defined herein shall have the meanings  ascribed to them in
the Securities Purchase Agreement),  the Company has agreed to issue and sell to
the  Initial  Investors  an  aggregate  of up to  5,000,000  shares  of Series B
Cumulative  Convertible  Redeemable  Preferred Stock, no par value,  $1.00 (plus
accrued dividends) liquidation preference of the Company (the "Preferred Stock,"
which  term,  as used  herein  shall  have  the  meaning  ascribed  to it in the
Securities Purchase Agreement); and

                  WHEREAS,  the Company has agreed to issue the  Warrants to the
Initial Investors in connection with the issuance of the Preferred Stock; and

                  WHEREAS,  the Preferred  Stock is  convertible  into shares of
Common  Stock  (the  "Conversion  Shares")  upon the  terms and  subject  to the
conditions contained in the Certificate of Designations; and

                  WHEREAS,  the  Warrants to be issued to the Initial  Investors
may be  exercised  for the  purchase  of shares of Common  Stock  (the  "Warrant
Shares") upon the terms and conditions of the Warrants; and

                  WHEREAS,  to induce  the  Initial  Investors  to  execute  and
deliver the  Securities  Purchase  Agreement,  the Company has agreed to provide
certain  registration  rights under the Securities Act of 1933, as amended,  and
the  rules  and  regulations  thereunder,   or  any  similar  successor  statute
(collectively,  the "Securities Act"), with respect to the Conversion Shares and
the Warrant Shares;

                  NOW,  THEREFORE,  in  consideration  of the  premises  and the
mutual covenants contained herein and other good and valuable consideration, the
receipt and  sufficiency of which are hereby  acknowledged,  the Company and the
Initial Investor hereby agree as follows:

                  1.      Definitions.  As used in this Agreement, the following
terms shall have the following meanings:

                  (a) "Investors"  means the Initial Investors and any permitted
transferee  or assignee  who agrees to become  bound by the  provisions  of this
Agreement in accordance with Section 9 hereof.

                  (b) "Potential Material Event" means any of the following: (i)
the possession by the Company of material information not ripe for disclosure in
a registration  statement,  which shall be evidenced by  determinations  in good
faith  by the  Board  of  Directors  of the  Company  that  disclosure  of  such
information in the  registration  statement would be detrimental to the business
and affairs of the Company;  or (ii) any material  engagement or activity by the
Company which would, in the good faith  determination  of the Board of Directors
of the Company, be adversely affected by disclosure in a registration  statement
at  such  time,  which  determination  shall  be  accompanied  by a  good  faith
determination  by the Board of Directors  of the Company  that the  registration
statement  would  be  materially   misleading   absent  the  inclusion  of  such
information.

                  (c) "Register,"  "Registered," and  "Registration"  refer to a
registration  effected  by  preparing  and filing a  Registration  Statement  or
Statements in compliance  with the Securities Act and pursuant to Rule 415 under
the Securities Act or any successor rule providing for offering  securities on a
continuous  basis ("Rule 415"), and the declaration or ordering of effectiveness
of such  Registration  Statement by the United  States  Securities  and Exchange
Commission (the "SEC").

                  (d)      "Registrable Securities"  means the Conversion Shares
and the Warrant Shares.

                  (e) "Registration Statement" means a registration statement of
the Company under the Securities Act.

                  2.       Registration.

                  (a) Mandatory Registration. The Company shall prepare and file
with the SEC, as soon as  possible  after the  Closing  Date,  but no later than
thirty (30) days  following the Closing Date, a  Registration  Statement on Form
SB-2, registering for resale by the Investors all of the Registrable Securities,
but in no event less than two hundred percent (200%) of the aggregate  number of
shares into (i) which the Preferred  Stock would be  convertible  at the time of
filing of the Registration Statement (assuming for such purposes that all shares
of Preferred  Stock had been eligible to be converted,  and had been  converted,
into  Conversion  Shares in  accordance  with their  terms,  whether or not such
eligibility or conversion had in fact occurred as of such date),  and (ii) which
would be issued upon  exercise  of all of the  Warrants at the time of filing of
the  Registration  Statement  (assuming for such purposes that all such Warrants
had been  eligible to be exercised  and had been  exercised in  accordance  with
their terms, whether or not such eligibility or exercise had in fact occurred as
of such date). The  Registration  Statement shall also state that, in accordance
with  Rule  416  and  457  under  the  Securities   Act,  it  also  covers  such
indeterminate number of additional shares of Common Stock as may become issuable
upon conversion of the Preferred Stock and the exercise of the Warrants (and the
Existing  Warrants) to prevent  dilution  resulting from stock splits,  or stock
dividends.  The  Company  will use its  reasonable  best  efforts  to cause  the
Registration  Statement to be declared  effective no later than ninety days (90)
days after the Closing 

                                       2

Date.  If at any time the  number  of  shares of  Common  Stock  into  which the
Preferred  Stock may be converted and which would be issued upon exercise of the
Warrants  equals more than  seventy  percent  (75%) of the  aggregate  number of
shares of Common  Stock then  registered,  the  Company  shall,  within ten (10)
business  days after receipt of a written  notice from any Investor,  either (i)
further amend the  Registration  Statement filed by the Company  pursuant to the
preceding  sentence,  if  such  Registration  Statement  has not  been  declared
effective  by the SEC at that time,  to register  200% of the  aggregate  of all
shares of Common Stock into which the Preferred  Stock may then or in the future
be converted and which would be issued  currently or in the future upon exercise
of the  Warrants,  or (ii) if such  Registration  Statement  has  been  declared
effective by the SEC at that time, file with the SEC an additional  Registration
Statement  on Form SB-2,  as may be  appropriate,  to  register  (A) 200% of the
aggregate shares of Common Stock into which the unconverted  Preferred Stock may
then or in the future be converted and which would be issued currently or in the
future upon exercise of the unexercised Warrants,  less (B) the aggregate number
of shares of Common  Stock  already  registered  which have not been issued upon
conversions  of Preferred  Stock or the exercise of Warrants.  The  Registration
Statement  shall not include any shares other than the  Registrable  Securities,
and certain  other shares that the Company is obligated to Register as set forth
in Schedule  5(b),  without the consent of all of the  Investors.  The  Investor
acknowledges  that  after the  closing  hereof  (but  prior to the filing of the
Registration  Statement)  up to five million  Preferred  Shares (less the amount
purchased  concurrently  herewith by the current  Investors)  may be sold by the
Company (and included on the  Registration  Statment) on the condition  that the
sale of such  Preferred  Shares is on the same terms which are  contained in the
Securities Purchase Agreement.

                  (b)      Payments by the Company.

                           (i)      If  the Registration  Statement covering the
Registrable  Securities  is not filed in  proper  form with the SEC on or before
thirty (30) days after the Closing Date (the "Required  Filing Date"),  then the
Company shall pay each Investor a late filing penalty (collectively "Late Filing
Penalties"),  (i) on the first day after the  Required  Filing  Date,  an amount
equal  to  three  percent  (3%)  of the  purchase  price  paid  pursuant  to the
Securities  Purchase  Agreement (the "Purchase  Price") for the Preferred  Stock
then  held by each  such  Investor  on such  date,  and (ii) on each  subsequent
monthly  anniversary of the Required Filing Date, if the Registration  Statement
has not been filed in proper  form on or before  such date,  an amount  equal to
three percent (3%) of the Purchase  Price for the  Preferred  Stock held by each
such Investor on each such subsequent monthly anniversary date.

                            (ii) If  the  Registration  Statement  covering  the
Registrable  Securities is not effective within the earlier of (a) five (5) days
after  notice by the SEC that it may be declared  effective,  or (b) ninety (90)
days  following  the Closing  Date (the  "Required  Effective  Date"),  then the
Company  shall pay each  Investor a late  effective  date penalty  (collectively
"Late  Effective  Date  Penalties")(sometimes  Late  Filing  Penalties  and Late
Effective  Penalties are collectively  referred to as "Late Penalties"),  (i) on
the first  day  after the  Required  Effective  Date,  an amount  equal to three
percent (3%) of the  Purchase  Price for the  Preferred  Stock then held by each
such Investor on such date and (ii) on each  subsequent  monthly  anniversary of
the Required Effective Date, if the Registration Statement has not been declared
effective  on or before such date,  an amount  equal to two percent  (2%) of the
Purchase  Price for the Preferred  Stock held by each such Investor on each such
subsequent monthly anniversary date.

                           (iii)  By way of  illustration  and not in limitation
of the  foregoing,  assuming  a  

                                       3

Closing  Date of February 3, 2000 (X) if the  Registration  Statement  is timely
filed but is not  declared  effective  until  July 15,  2000  (assuming  for the
purpose of this example that the SEC has not previously  provided notice that it
may be declared effective), the aggregate Late Effective Date Penalty will equal
9% percent of the  Purchase  Price (3% on May 4, the 90th day after the  Closing
Date, plus 3% on June 3 and July 2) or (Y) if the Registration is filed on April
9 and is not declared  effective until May 15, 2000 (assuming for the purpose of
this  example  that the SEC has not  previously  provided  notice that it may be
declared  effective),  the  aggregate  Late Filing  Penalty will equal 6% of the
Purchase  Price (3% on March 5, the 30th day after the Closing Date,  plus 3% on
April 4) and the aggregate  Late Effective Date Penalty will equal 3% percent of
the Purchase Price (3% on May 4, the 90th day after the Closing Date).

                           (iv)      Additionally,   if  (a)  the   Registration
Statement  is not filed  within sixty (60) days from the Closing Date or (b) the
Required  Effective  Date is greater than one hundred fifty (150) days after the
Closing  Date, or (c) the  effectiveness  of the  Registration  Statement is not
maintained during the Registration Period as hereinafter defined,  each Investor
may, at its option,  require the Company to redeem the Preferred Shares in full,
within  three  (3)  days,  in  cash,  in  accordance  with  Section  6(b) of the
Certificate of Designation.

                           (v)       Late  Penalties  will  be  payable  to  the
Investor by the Company in cash or other immediately available funds on the date
such Late Penalty is incurred.

                           (vi)     The  parties  acknowledge  that  the damages
which may be incurred by the  Investors  if the  Registration  Statement  is not
filed by the Required Filing Date or if the Registration  Statement has not been
declared  effective  by the  Required  Registration  Date  may be  difficult  to
ascertain.  The parties  agree that the Late  Penalties  represent a  reasonable
estimate on the part of the parties,  as of the date of this  Agreement,  of the
amount of such damages. The payment of the Late Penalties to the Investors shall
not limit the Investors' other rights and remedies  hereunder or under any other
document entered into in connection herewith.

                           (vii)  Notwithstanding  the  foregoing,  the  amounts
payable by the Company  pursuant to this  provision  shall not be payable to the
extent  any delay in the  effectiveness  of the  Registration  Statement  occurs
because of an act of, or a failure to act or to act timely by the  Investors  or
their counsel if the Company timely  forwards to counsel any required  documents
or in the event all of the  Registrable  Securities may be sold pursuant to Rule
144 or another available exemption under the Act.

                  3.  Obligations  of  the  Company.   In  connection  with  the
registration  of the  Registrable  Securities,  the Company shall do each of the
following.
                  (a) Prepare  promptly,  and file with the SEC by the  Required
Filing Date, the Registration Statement with respect to not less than the number
of Registrable Securities provided in Section 2(a) above, and thereafter use its
reasonable  best  efforts  to cause  each  Registration  Statement  relating  to
Registrable  Securities to become  effective by the Required  Effective Date and
keep the Registration  Statement  effective at all times until the earliest (the
"Registration  Period")  of (i) the date that is two (2) years after the Closing
Date, (ii) the date when the Investors may sell all Registrable Securities under
Rule 144 or (iii) the date the  Investors  no longer own any of the  Registrable
Securities,   which   Registration   Statement   (including  any  amendments  or
supplements  thereto and prospectuses  contained  

                                       4

therein)  shall not contain any untrue  statement of a material  fact or omit to
state a material  fact  required to be stated  therein or  necessary to make the
statements  therein,  in light of the circumstances in which they were made, not
misleading;

                  (b) Prepare and file with the SEC such  amendments  (including
post-effective amendments) and supplements to the Registration Statement and the
prospectus  used  in  connection  with  the  Registration  Statement  as  may be
necessary  to  keep  the   Registration   effective  at  all  times  during  the
Registration  Period,  and,  during the  Registration  Period,  comply  with the
provisions  of  the  Securities  Act  with  respect  to the  disposition  of all
Registrable  Securities  of the Company  covered by the  Registration  Statement
until such time as all of such  Registrable  Securities have been disposed of in
accordance  with the intended  methods of  disposition  by the seller or sellers
thereof as set forth in the Registration Statement;

                  (c)  The  Company  shall  permit  a  single  firm  or  counsel
designated  by the  Investors  to  review  the  Registration  Statement  and all
amendments  and  supplements  thereto a reasonable  period of time (but not less
than three (3)  business  days) prior to their filing with the SEC, and not file
any document in a form to which such counsel reasonably objects.

                  (d)  Notify  the   Investors,   their   counsel  and  managing
underwriters,  if any,  immediately  (and, in the case of (i)(A) below, not less
than five (5) days prior to such  filing) and (if  requested by any such Person)
confirm such notice in writing no later than one (1) Business Day  following the
day (i)(A) when a Prospectus  or any  Prospectus  supplement  or  post-effective
amendment to the  Registration  Statement is proposed to be filed;  (B) whenever
the  Commission  notifies the Company  whether  there will be a "review" of such
Registration Statement; (C) whenever the Company receives (or representatives of
the  Company  receive  on its  behalf)  any oral or  written  comments  from the
Commission  in respect of a  Registration  Statement  (copies or, in the case of
oral  comments,  summaries of such comments  shall be promptly  furnished by the
Company to the Investors); and (D) with respect to the Registration Statement or
any post-effective  amendment,  when the same has become effective;  (ii) of any
request by the Commission or any other Federal or state  governmental  authority
for amendments or supplements to the Registration Statement or Prospectus or for
additional  information;  (iii) of the  issuance by the  Commission  of any stop
order suspending the effectiveness of the Registration Statement covering any or
all of the Registrable  Securities or the initiation of any Proceedings for that
purpose;  (iv) if at any time any of the  representations  or  warranties of the
Company  contained  in any  agreement  (including  any  underwriting  agreement)
contemplated hereby ceases to be true and correct in all material respects;  (v)
of the receipt by the Company of any notification with respect to the suspension
of the  qualification or exemption from  qualification of any of the Registrable
Securities for sale in any jurisdiction, or the initiation or threatening of any
Proceeding for such purpose; and (vi) of the occurrence of any event that to the
best  knowledge  of the Company  makes any  statement  made in the  Registration
Statement  or  Prospectus  or  any  document   incorporated   or  deemed  to  be
incorporated  therein  by  reference  untrue  in any  material  respect  or that
requires  any  revisions  to the  Registration  Statement,  Prospectus  or other
documents so that, in the case of the Registration  Statement or the Prospectus,
as the case may be, it will not contain any untrue  statement of a material fact
or omit to state any material fact required to be stated therein or necessary to
make the statements therein, in light of the circumstances under which they were
made, not misleading.  In addition, the Company shall furnish the Investors with
copies of all intended written responses to the comments  contemplated in clause
(C) of this  Section  3(d) not later than one (1) Business Day in advance 

                                       5

of the filing of such responses with the Commission so that the Investors  shall
have the opportunity to comment thereon.

                  (e) Furnish to each Investor whose Registrable  Securities are
included in the Registration  Statement and its legal counsel  identified to the
Company, (i) promptly after the same is prepared and publicly distributed, filed
with the SEC,  or  received  by the  Company,  one (1) copy of the  Registration
Statement,  each  preliminary  prospectus and prospectus,  and each amendment or
supplement  thereto,  and (ii) such  number of copies of a  prospectus,  and all
amendments and supplements  thereto and such other  documents,  as such Investor
may reasonably request in order to facilitate the disposition of the Registrable
Securities owned by such Investor;

                  (f) As promptly as  practicable  after  becoming aware of such
event,  notify each  Investor of the happening of any event of which the Company
has knowledge,  as a result of which the prospectus included in the Registration
Statement, as then in effect, includes an untrue statement of a material fact or
omits to state a material  fact  required to be stated  therein or  necessary to
make the statements therein, in light of the circumstances under which they were
made, not misleading,  and use its best efforts promptly to prepare a supplement
or amendment to the Registration  Statement or other appropriate filing with the
SEC to correct such untrue statement or omission, and deliver a number of copies
of such supplement or amendment to each Investor as such Investor may reasonably
request;

                  (g) As promptly as  practicable  after  becoming aware of such
event, notify each Investor who holds Registrable  Securities being sold (or, in
the  event  of an  underwritten  offering,  the  managing  underwriters)  of the
issuance by the SEC of a Notice of  Effectiveness or any notice of effectiveness
or any stop order or other  suspension of the  effectiveness of the Registration
Statement at the earliest possible time;

                  (h) Notwithstanding the foregoing, if at any time or from time
to time  after the date of  effectiveness  of the  Registration  Statement,  the
Company  notifies  the  Investors  in writing of the  existence  of a  Potential
Material  Event,   the  Investors  shall  not  offer  or  sell  any  Registrable
Securities,  or engage in any other  transaction  involving  or  relating to the
Registrable Securities,  from the time of the giving of notice with respect to a
Potential  Material Event until such Investor  receives  written notice from the
Company that such  Potential  Material  Event  either has been  disclosed to the
public or no longer constitutes a Potential Material Event;  provided,  however,
that the  Company may not so suspend  the right to such  holders of  Registrable
Securities for more than two twenty (20) day periods in the aggregate during any
12-month  period  ("Suspension  Period")  with at least a ten (10)  business day
interval between such periods,  during the periods the Registration Statement is
required to be in effect;

                  (i) Use its  reasonable  efforts  to  secure or  maintain,  as
applicable,  NASDAQ/OTC  Bulletin  Board  authorization  and  quotation for such
Registrable Securities and, without limiting the generality of the foregoing, to
arrange for at least two market makers to register with the National Association
of Securities  Dealers,  Inc.  ("NASD") as such with respect to such Registrable
Securities;

                  (j)  Provide a transfer  agent and  registrar,  which may be a
single entity, for the Registrable  Securities not later than the effective date
of the Registration Statement;

                                       6

                  (k)  Cooperate   with  the  Investors  who  hold   Registrable
Securities  (or,  subject to receipt by the  Company of  appropriate  notice and
documentation,  as may be required by the  Securities  Purchase  Agreement,  the
Certificate  of  Designations,  the  Warrants  or  this  Agreement,   securities
convertible into Registrable  Securities) being offered to facilitate the timely
preparation  and delivery of certificates  for the Registrable  Securities to be
offered pursuant to the Registration  Statement and enable such certificates for
the Registrable  Securities to be in such  denominations  or amounts as the case
may be, as the Investors may reasonably request,  and, within three (3) business
days after a Registration  Statement  which includes  Registrable  Securities is
ordered  effective by the SEC, the Company shall deliver,  and shall cause legal
counsel  selected  by the  Company to  deliver,  to the  transfer  agent for the
Registrable   Securities  (with  copies  to  the  Investors  whose   Registrable
Securities or securities convertible into Registrable Securities are included in
such  Registration  Statement) an  appropriate  instruction  and opinion of such
counsel;  provided,  however,  that  nothing in this  subparagraph  (j) shall be
deemed to waive any of the  provisions  regarding  the  conditions  or method of
conversion  of  Preferred  Stock  or  exercise  of  Warrants  into   Registrable
Securities; and

                  (l) Take all other  reasonable  actions  necessary to expedite
and  facilitate  disposition  by  the  Investor  of the  Registrable  Securities
pursuant to the Registration Statement.

                  4.  Obligations  of the  Investors.  In  connection  with  the
registration  of the  Registrable  Securities,  each  Investor  shall  have  the
following obligations:

                  (a) As a condition precedent to the obligations of the Company
to complete  the  registration  pursuant to this  Agreement  with respect to the
Registrable Securities of a particular Investor,  such Investor shall furnish to
the Company such information  regarding itself, the Registrable  Securities held
by it, and the intended method of disposition of the Registrable Securities held
by it, as shall be  reasonably  required  to  effect  the  registration  of such
Registrable  Securities and shall execute such documents in connection with such
registration as the Company may reasonably request. At least five (5) days prior
to the first anticipated filing date of the Registration Statement,  the Company
shall notify each  Investor of the  information  the Company  requires from each
such Investor (the "Requested  Information") if such Investor elects to have any
of  such  Investor's   Registrable   Securities  included  in  the  Registration
Statement.  If at least  two (2)  business  days  prior to the  filing  date the
Company  has  not  received  the  Requested  Information  from  an  Investor  (a
"Non-Responsive Investor"), then the Company may file the Registration Statement
without including Registrable Securities of such Non-Responsive Investor;

                  (b) To cooperate  with the Company as reasonably  requested by
the Company in connection with the  preparation  and filing of the  Registration
Statement hereunder, unless such Investor has notified the Company in writing of
such  Investor's  election  to  exclude  all  of  such  Investor's   Registrable
Securities from the Registration Statement; and

                  (c)  Upon  receipt  of any  notice  from  the  Company  of the
happening of any event of the kind  described  in Section  3(e) or 3(f),  above,
such  Investor  shall   immediately   discontinue   disposition  of  Registrable
Securities  pursuant to the  Registration  Statement  covering such  Registrable
Securities  until such Investor's  receipt of the copies of the  supplemented or
amended  prospectus  contemplated by Section 3(e) or 3(f) and, if so directed by
the Company,  such Investor  shall deliver to the Company (at the expense of the
Company) or destroy (and deliver to the Company a  certificate  of  destruction)
all  copies in such  

                                       7

Investor's  possession,  of the prospectus covering such Registrable  Securities
current at the time of receipt of such notice.

                  5.  Expenses  of  Registration.  (a) All  reasonable  expenses
(other than  underwriting  discounts and  commissions of each Investor and legal
fees of counsel to each  Investor)  incurred in connection  with  registrations,
filings or qualifications pursuant to Section 3, including,  without limitation,
all registration,  listing,  and  qualifications  fees,  printers and accounting
fees,  the fees and  disbursements  of counsel for the Company,  and a fee for a
single  counsel for the Investors not  exceeding  $3,500,  shall be borne by the
Company.

                  (b)  Except  as and to the  extent  specifically  set forth in
Schedule 5(b) attached  hereto,  neither the Company nor any of its subsidiaries
has, as of the date hereof,  nor shall the Company nor any of its  subsidiaries,
on or after the date of this Agreement, enter into any agreement with respect to
its  securities  that is  inconsistent  with the rights granted to the Investors
herein or otherwise  conflicts with the provisions hereof.  Except as and to the
extent  specifically  set forth in Schedule  5(b) attached  hereto,  neither the
Company nor any of its  subsidiaries  has previously  entered into any agreement
granting any  registration  rights with respect to any of its  securities to any
person or entity. Without limiting the generality of the foregoing,  without the
written  consent  of  the  Investors  of a  majority  of  the  then  outstanding
Registrable  Securities,  the Company shall not grant to any person the right to
request  the  Company  to  register  any  securities  of the  Company  under the
Securities  Act unless the rights so granted are subject in all  respects to the
prior rights in full of the Investors set forth herein, and are not otherwise in
conflict or inconsistent with the provisions of this Agreement.

                  6.  Indemnification.  In the event any Registrable  Securities
are included in a Registration Statement under this Agreement:

                  (a) To the extent permitted by law, the Company will indemnify
and hold  harmless  each  Investor who holds such  Registrable  Securities,  the
directors,  if any, of such  Investor,  the officers,  if any, of such Investor,
each  person,  if any,  who  controls  any  Investor  within the  meaning of the
Securities Act or the Securities Exchange Act of 1934, as amended (the "Exchange
Act")  (each,  an  "Indemnified  Person" or  "Indemnified  Party"),  against any
losses,  claims,  damages,  liabilities or expenses (joint or several)  incurred
(collectively,  "Claims")  to which  any of them may  become  subject  under the
Securities  Act,  the  Exchange  Act or  otherwise,  insofar as such  Claims (or
actions or proceedings,  whether  commenced or threatened,  in respect  thereof)
arise out of or are based upon any of the  following  statements,  omissions  or
violations  in  the  Registration  Statement,  or any  post-effective  amendment
thereof, or any prospectus included therein: (i) any untrue statement or alleged
untrue statement of a material fact contained in the  Registration  Statement or
any  post-effective  amendment  thereof or the  omission or alleged  omission to
state therein a material fact required to be stated therein or necessary to make
the  statements  therein not  misleading,  (ii) any untrue  statement or alleged
untrue  statement  of a material  fact  contained  in the final  prospectus  (as
amended  or  supplemented,  if  the  Company  files  any  amendment  thereof  or
supplement  thereto with the SEC) or the  omission or alleged  omission to state
therein any material fact  necessary to make the  statements  made  therein,  in
light of the  circumstances  under which the  statements  therein were made, not
misleading  or (iii) any  violation  or alleged  violation by the Company of the
Securities  Act,  the  Exchange  Act,  any state  securities  law or any rule or
regulation  under the Securities  Act, the Exchange Act or any state  securities
law (the matters in the foregoing clauses (i) through (iii) 

                                       8

being, collectively, "Violations"). Subject to clause (b) of this Section 6, the
Company shall  reimburse the  Investors,  promptly as such expenses are incurred
and  are due and  payable,  for any  legal  fees or  other  reasonable  expenses
incurred by them in connection with  investigating  or defending any such Claim.
Notwithstanding  anything to the contrary contained herein, the  indemnification
agreement  contained in this Section 6(a) shall not (I) apply to a Claim arising
out of or based upon a Violation which occurs in reliance upon and in conformity
with  information  furnished  in writing  to the  Company by or on behalf of any
Indemnified  Person  expressly for use in connection with the preparation of the
Registration  Statement or any such amendment thereof or supplement  thereto, if
such  prospectus  was timely made  available by the Company  pursuant to Section
3(c) hereof; (II) be available to the extent such Claim is based on a failure of
the Investor to deliver or cause to be delivered the  prospectus  made available
by the  Company;  or (III) apply to amounts paid in  settlement  of any Claim if
such  settlement is effected  without the prior written  consent of the Company,
which consent shall not be unreasonably  withheld.  Each Investor will indemnify
the Company and its officers,  directors and agents  against any claims  arising
out of or based upon a Violation which occurs in reliance upon and in conformity
with  information  furnished in writing to the Company,  by or on behalf of such
Investor,   expressly  for  use  in  connection  with  the  preparation  of  the
Registration  Statement,  subject  to such  limitations  and  conditions  as are
applicable  to the  Indemnification  provided by the Company to this  Section 6.
Such  indemnity  shall  remain  in  full  force  and  effect  regardless  of any
investigation  made by or on behalf of the Indemnified  Person and shall survive
the transfer of the Registrable  Securities by the Investors pursuant to Section
9.

                  (b)  Promptly  after  receipt  by  an  Indemnified  Person  or
Indemnified  Party  under this  Section 6 of notice of the  commencement  of any
action  (including  any  governmental   action),   such  Indemnified  Person  or
Indemnified Party shall, if a Claim in respect thereof is to be made against any
indemnifying  party under this  Section 6, deliver to the  indemnifying  party a
written notice of the commencement thereof and the indemnifying party shall have
the right to  participate  in,  and,  to the  extent the  indemnifying  party so
desires,  jointly with any other indemnifying party similarly noticed, to assume
control  of the  defense  thereof  with  counsel  mutually  satisfactory  to the
indemnifying  party and the Indemnified  Person or the Indemnified Party, as the
case may be. In case any such action is brought against any  Indemnified  Person
or Indemnified Party, and it notifies the indemnifying party of the commencement
thereof,  the indemnifying party will be entitled to participate in, and, to the
extent that it may wish,  jointly with any other  indemnifying  party  similarly
notified,  assume the defense thereof,  subject to the provisions  herein stated
and after  notice  from the  indemnifying  party to such  Indemnified  Person or
Indemnified  Party  of its  election  so to  assume  the  defense  thereof,  the
indemnifying  party will not be liable to such Indemnified Person or Indemnified
Party  under  this  Section  6 for any  reasonable  legal  or  other  reasonable
out-of-pocket  expenses  subsequently  incurred  by such  Indemnified  Person or
Indemnified  Party in connection  with the defense thereof other than reasonable
costs of  investigation,  unless  the  indemnifying  party  shall not pursue the
action of its final  conclusion.  The  Indemnified  Person or Indemnified  Party
shall  have the right to  employ  separate  counsel  in any such  action  and to
participate in the defense  thereof,  but the fees and reasonable  out-of-pocket
expenses of such counsel shall not be at the expense of the  indemnifying  party
if the  indemnifying  party has assumed  the defense of the action with  counsel
reasonably  satisfactory to the  Indemnified  Person or Indemnified  Party.  The
failure to deliver written notice to the indemnifying  party within a reasonable
time of the commencement of any such action shall not relieve such  indemnifying
party of any liability to the Indemnified Person or Indemnified Party under this
Section 6, except to the extent that the indemnifying party is prejudiced in its
ability to defend such action.  The  indemnification  required by this Section 6
shall be made by periodic  payments of the 

                                       9

amount  thereof  during  the course of the  investigation  or  defense,  as such
expense, loss, damage or liability is incurred and is due and payable.

                  7.  Contribution.  To the  extent  any  indemnification  by an
indemnifying  party is  prohibited  or limited by law,  the  indemnifying  party
agrees to make the maximum contribution with respect to any amounts for which it
would  otherwise be liable under  Section 6 to the fullest  extent  permitted by
law;  provided,   however,   that  (a)  no  contribution  shall  be  made  under
circumstances  where the maker  would not have been  liable for  indemnification
under the fault  standards set forth in Section 6; (b) no seller of  Registrable
Securities guilty of fraudulent misrepresentation (within the meaning of Section
11(f) of the Securities Act) shall be entitled to  contribution  from any seller
of   Registrable   Securities   who  was   not   guilty   of   such   fraudulent
misrepresentation;  and (c) contribution by any seller of Registrable Securities
shall be limited in amount to the net amount of proceeds received by such seller
from the sale of such Registrable Securities.

                  8. Reports under Exchange Act. With a view to making available
to the Investors the benefits of Rule 144  promulgated  under the Securities Act
or any other  similar rule or  regulation of the SEC that may at any time permit
the  Investors  to  sell  securities  of  the  Company  to  the  public  without
registration ("Rule 144"), the Company agrees to:

                  (a)      make and keep public information available,  as those
terms are understood and defined in Rule 144;

                  (b) use its  best  efforts  to file  with  the SEC in a timely
manner  all  reports  and other  documents  required  of the  Company  under the
Securities Act and the Exchange Act; and

                  (c)  furnish to each  Investor so long as such  Investor  owns
Registrable  Securities,  promptly upon request,  (i) a written statement by the
Company that it has complied  with the reporting  requirements  of Rule 144, the
Securities  Act and the Exchange  Act,  (ii) a copy of the most recent annual or
quarterly report of the Company and such other reports and documents so filed by
the Company and (iii) such other  information as may be reasonably  requested to
permit  the  Investors  to sell such  securities  pursuant  to Rule 144  without
registration.

                  9. Assignment of the Registration  Rights.  The rights to have
the Company register Registrable  Securities pursuant to this Agreement shall be
automatically  assigned  by an  Investor to any  transferee  of the  Registrable
Securities (or all or any portion of any Preferred Stock of the Company which is
convertible  into such  securities)  permitted  or allowable by the terms of the
Securities  Purchase Agreement only if: (a) such Investor agrees in writing with
the  transferee or assignee to assign such rights,  and a copy of such agreement
is furnished to the Company within a reasonable time after such assignment,  (b)
the Company is,  within a  reasonable  time after such  transfer or  assignment,
furnished with written notice of (i) the name and address of such  transferee or
assignee and (ii) the securities with respect to which such registration  rights
are being  transferred or assigned,  (c) immediately  following such transfer or
assignment  the further  disposition  of such  securities  by the  transferee or
assignee is restricted  under the Securities Act and applicable state securities
laws,  and (d) at or before the time the Company  received  the  written  notice
contemplated by clause (b) of this sentence the transferee or assignee agrees in
writing  with or in favor of the  Company  to be bound by all of the  provisions
contained  herein, a copy of which shall 

                                       10

be provided to the Company. The copies referred to in clauses (a) and (d) of the
immediately  preceding  sentence may be redacted to delete certain financial and
other details of the transaction  between the Investor and its transferee if the
same is included in the document to be provided to the Company.  In the event of
any delay in filing or effectiveness  of the Registration  Statement as a result
of such assignment, the Company shall not be liable for any damages arising from
such delay, or the payments set forth in Section 2(c) hereof.

                  10.  Amendment of Registration  Rights.  Any provision of each
such Agreement may be amended and the  observance  thereof may be waived (either
generally   or  in  a   particular   instance   and  either   retroactively   or
prospectively),  only with the written  consent of the Company and Investors who
hold collectively eighty (80%) percent of the Preferred Shares. Any amendment or
waiver  effected in  accordance  with this Section 10 shall be binding upon each
Investor and the Company.

                  11.      Miscellaneous.

                  (a) A person or entity is deemed to be a holder of Registrable
Securities  whenever  such  person or entity  owns of  record  such  Registrable
Securities.  If  the  Company  receives  conflicting  instructions,  notices  or
elections  from  two or more  persons  or  entities  with  respect  to the  same
Registrable  Securities,  the Company shall act upon the basis of  instructions,
notice  or  election  received  from the  registered  owner of such  Registrable
Securities.

                  (b) Any notice or communication  required or permitted by this
Agreement shall be given in writing addressed as follows:

         If to Company:       U.S. Wireless Data, Inc.
                              2200 Powell Street, Suite 800
                              Emeryville, California 94608
                              Attention: Robert Robichaud, CFO

         with a copy to:      Jack Lewis, Esq.
                              1675 Broadway, Suite 2600
                              Denver, Colorado 80202

         If to Investors:     Bold Street, LLC
                              c/o Thomson Kernaghan & Co.
                              365 Bay Street, Suite 1000, 10th Fl.
                              Toronto, Ontario M5H 2V2
                              Telephone No.: (416) 860-4160
                              Telecopier No.: (416) 860-8313

         with a copy to:      Michael S. Rosenblum, Esq.
                              Law Offices of Michael S. Rosenblum
                              1875 Century Park East, Suite 700
                              Los Angeles, California 90067

                                       11

All notices  shall be served  personally  by  telecopy,  by telex,  by overnight
express mail service or other overnight courier, or by first class registered or
certified mail, postage prepaid, return receipt requested. If served personally,
or by telecopy,  notice shall be deemed delivered upon receipt (provided that if
served by telecopy,  sender has written confirmation of delivery);  if served by
overnight  express mail or overnight  courier,  notice shall be deemed delivered
forty-eight (48) hours after deposit;  and if served by first class mail, notice
shall be deemed delivered  seventy-two  (72) hours after mailing.  Any party may
give written  notification to the other parties of any change of address for the
sending of notices, pursuant to any method provided for herein.

                  (c) Failure of any party to exercise any right or remedy under
this  Agreement or otherwise,  or delay by a party in  exercising  such right or
remedy, shall not operate as a waiver thereof.

                  (d) This  Agreement  shall be governed by and  interpreted  in
accordance  with the laws of the State of California  for contracts to be wholly
performed  in such state and without  giving  effect to the  principles  thereof
regarding the conflict of laws. Any litigation based thereon, or arising out of,
under, or in connection with, this agreement or any course of conduct, course of
dealing,  statements  (whether  oral or  written)  or actions of the  Company or
Purchaser  shall be brought and  maintained  exclusively in the state or Federal
courts of the  State of  California,  sitting  in the City of Los  Angeles.  The
Company hereby  expressly and  irrevocably  submits to the  jurisdiction  of the
state and federal  Courts of the State of California for the purpose of any such
litigation  as set forth above and  irrevocably  agrees to be bound by any final
judgment  rendered  thereby in  connection  with such  litigation.  The  Company
further  irrevocably  consents  to the  service of process by  registered  mail,
postage  prepaid,  or by  personal  service  within  or  without  the  State  of
California.  The Company hereby expressly and irrevocably waives, to the fullest
extent  permitted by law, any objection  which it may have or hereafter may have
to the laying of venue of any such litigation brought in any such court referred
to above  and any  claim  that  any such  litigation  has  been  brought  in any
inconvenient  forum. To the extent that the Company has or hereafter may acquire
any immunity from  jurisdiction of any court or from any legal process  (whether
through service or notice,  attachment  prior to judgment,  attachment in aid of
execution  or  otherwise)  with respect to itself or its  property,  the Company
hereby irrevocably waives such immunity in respect of its obligations under this
Agreement and the related agreements entered into in connection herewith.


                  (e) If any  provision  of this  Agreement  shall be invalid or
unenforceable in any jurisdiction, such invalidity or unenforceability shall not
affect the validity or  enforceability of the remainder of this Agreement or the
validity or enforceability of this Agreement in any other jurisdiction.

                  (f)  Subject to the  requirements  of  Section 9 hereof,  this
Agreement  shall inure to the benefit of and be binding upon the  successors and
assigns of each of the parties hereto.

                  (g) All  pronouns  and any  variations  thereof  refer  to the
masculine, feminine or neuter, singular or plural, as the context may require.

                  (h) The  headings in this  Agreement  are for  convenience  of
reference only and shall not limit or otherwise affect the meaning thereof.

                                       12

                  (i)  This   Agreement   may  be   executed   in  one  or  more
counterparts,  each of which shall be deemed an original  but all of which shall
constitute one and the same agreement. This Agreement, once executed by a party,
may be  delivered  to  the  other  party  hereto  by  telephone  line  facsimile
transmission  of a copy of this Agreement  bearing the signature of the party so
delivering this Agreement.

                  (j) The Company  acknowledges  that any failure by the Company
to perform its  obligations  under  Section  3(a)  hereof,  or any delay in such
performance could result in loss to the Investors,  and the Company agrees that,
in  addition  to any  other  liability  the  Company  may have by reason of such
failure or delay,  the Company shall be liable for all direct  damages caused by
any such  failure  or delay,  unless  the same is the  result of force  majeure.
Neither party shall be liable for consequential damages.

                  (k) This Agreement,  the Securities Purchase Agreement and the
other documents  referenced  therein  constitute the entire  agreement among the
parties  hereto  with  respect  to  the  subject  matter  hereof.  There  are no
restrictions,  promises, warranties or undertakings,  other than those set forth
or  referred to herein.  This  Agreement  supersedes  all prior  agreements  and
understandings  among the  parties  hereto with  respect to the  subject  matter
hereof. This Agreement may be amended only by an instrument in writing signed by
the party to be charged with enforcement thereof.

                  (l) Any default by an  individual  Investor  hereunder  or any
related  agreement,  including,  without  limitation,  the  Securities  Purchase
Agreement,  shall not be deemed a default  by any other  Investor  and shall not
excuse the Company's  performance  hereunder or  thereunder  with respect to the
non-defaulting Investors.


                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]



                                       13


                  IN WITNESS WHEREOF,  the parties have caused this Agreement to
be duly executed by their  respective  officers  thereunto duly authorized as of
the day and year first above written.

                U.S. Wireless Data, Inc., a Colorado corporation


                By:                    
                    -------------------------------------------- 
                Name:
                    --------------------------------------------
                Title:
                      ------------------------------------------

                BOLD STREET LLC, a Cayman Islands limited liability company



                By:                   
                    --------------------------------------------
                    Manager


                ------------------------------------------------


                By:                      
                    --------------------------------------------
                         Authorized Signatory




                                    REGISTRATION RIGHTS AGREEMENT
                                                                     

                                            EXHIBIT 5(b)


                             ---------------------------------------------------------
                             Assumed Stock Price for conversions:              $ 1.00
                             ---------------------------------------------------------
         Estimated #
       Common Shares (000)   Description of Outstanding Security                              Registration Rights
- ----------------------------------------------------------------------------------------------------------------------

                                                                                         
                   1,053     Est. 790K  8% Preferred Series A shares 12/97 -                  Mandatory and Piggyback - 144 avail.
                             (@ 75% of avg. closing bid price)
                     100     Estimate of Series A dividends through 12/99 (w/o conv.)         Mandatory and Piggyback - 144 avail.
                   2,500     $2M 6% Convertible Debentures 7/98-7/00                          Mandatory and Piggyback
                             (@ 80% of avg. closing bid  price)

                      50     JWG finder warrants @ $6.525 - 12/97-12/00                       Piggyback - 144 avail.
                       8     entrenet consulting warrants @ $2.40 - 9/98-9/03                 Piggyback
                      20     RBB Bank Bridge Loan warrants @ $4.375 - 6/98-9/01               Piggyback
                     100     6% Convertible Debenture holder warrants @$ 4.25 - 7/98-7/01     Mandatory and Piggyback
                      60     JWG finder warrants @ $4.50 -  7/98-7/01                         Piggyback - unlimited
                      15     JWG finder warrants @ $2.70 -  9/98-9/01                         Piggyback
                     212     Warrants on Series A Preferred Redemption @$2.40 - 3.69          Mandatory and Piggyback
                             10/98 to 12/98-10/01 to 12/01
                     100     EBI consulting warrants @ $1.00 - 3/99-3/02                      Piggyback


                      50     RBB Bridge Loan - 3/99                                           Mandatory and Piggyback
                     375     Software Purchase - Maverick                                     Piggyback


                   4,643

                    Note:  John  Liviakis,  Bob  Prag,  and  Liviakis  Financial
                    Communications,  Inc. and entrenet and its  affiliates  have
                    waived  registration  rights on all previously issued shares
                    for this registration statement.