Lang  Michener

               BARRSTERS& SOLICITORS - PATENT & TRADE MARK AGENTS


Toronto        BCE Place, P.O. Box 747, Suite 2500
Vancouver      181 Bay Street, Toronto, Ontario, Canada  M5J2T7
Ottawa         Telephone (416) 360-8600
Facsimile      (416)365-1719


               July 21, 2003
               Diversinet  Corp.
               2225 Sheppard Avenue East,
               Suite 1801,
               Toronto, ON M2J 5C2


               Dear  Sirs:

               RE:  DIVERSINET CORP. (THE "COMPANY")

               We  have  acted  as  special  Canadian  counsel to the Company in
               connection  with  the  (i)  the  issue and sale by the Company of
               5,000,000  common  shares (the "Placement Shares") in the capital
               of  the  Company  pursuant  to  stock  purchase  agreements  (the
               "Purchase Agreements") made as of May 15, 2003 and as accepted by
               the  Company  June  23,  2003  among  the Company and each of the
               Purchasers  (the  "Purchasers")  named  therein (such transaction
               being  referred to as the "Private Placement"), (ii) the issue by
               the Company of 40,000 common shares in the capital of the Company
               (the  "Retainer  Shares") as directed by Sunrise Securities Corp.
               (the  "Agent") in respect of the Retainer Fee under the Financial
               Advisory  and  Investment  Banking  Agreement  (the  "Advisory
               Agreement")  dated  May 9, 2003, 2003 between the Company and the
               Agent,  (iii)  the  issue by the Company of 500,000 warrants (the
               "Broker  Warrants") under the terms of the Advisory Agreement and
               as  directed by the Agent, with each Broker Warrant entitling the
               holder  to  subscribe  for one common share in the capital of the
               Company  (the  "Broker  Warrant Shares") during the period stated
               therein  at  a  price  of  US$0.62  (subject  to  adjustment  in
               accordance  with the term thereof); (iv) the issue by the Company
               of  500,000 common shares in the capital of the Company (the "Fee
               Shares") in respect of the fee payable to the Agent in connection
               with  the  Private  Placement  under  the  terms  of the Advisory
               Agreement  and  as  directed  by  the Agent; (v) the issue by the
               Company  of  200,000  common shares in the capital of the Company
               (the  "PR  Shares")  under  the  terms  of the a Public Relations
               Agreement  (the  "PR  Agreement")  dated May 14, 2003 between the
               Company  and  Sunrise  Financial  Group,  Inc. and as directed by
               Sunrise  Financial  Group, Inc.; (vi) the issue by the Company of
               100,000  warrants  (the  "PR Warrants") under the terms of the PR
               Agreement  and as directed by Sunrise Financial Group, Inc., with
               each  PR Warrant entitling the holder to subscribe for one common
               share  in  the  capital  of the Company (the "PR Warrant Shares")
               during  the  period stated therein at a price of US$0.60 (subject
               to  adjustment  in  accordance  with the term thereof); (vii) the
               issue  by  the Company of 250,000 common shares in the capital of
               the



               Lang  Michener

               BARRSTERS& SOLICITORS - PATENT & TRADE MARK AGENTS


               Company  (the "Business Development Shares") under the terms of a
               Business  Development  Agreement  dated  May 14, 2003 between the
               Company  and iSimplify LLC (the "Business Development Agreement")
               and  as  directed  by  iSimplify  LLC;  (viii)  the  review of an
               aggregate  of  120,000  warrants  of the Company dated January 2,
               2003 issued to five individuals in accordance with a direction of
               Parul  Atul  Parikh  (the  "DSS Warrants"), with each DSS Warrant
               entitling  the  holder  to  subscribe for one common share in the
               capital  of  the Company (the "DSS Warrant Shares") at a price of
               US$3.75  (after  giving  effect  to a subsequent 10 for one share
               consolidation)  during the periods specified therein with respect
               to a specified number of common shares; and (ix) the review of an
               Advisory  Board  Consultant  Agreement  between the Company. Good
               Harbor Consulting, LLC ("Good Harbor")and Richard Clark effective
               July  1, 2003 (the "Good Harbor Agreement") pursuant to which the
               Company  has agreed to issue to 50,000 warrants (the "Good Harbor
               Warrants")  to  Good  Harbor,  with  each  Good  Harbor  Warrant
               entitling  the  holder  to  subscribe for one common share in the
               capital  of  the  Company (the "Good Harbor Warrant Shares") at a
               price  of  US$0.62.

               In  connection  with  rendering  this  opinion,

               (a)  we  have  reviewed  the following documents: (i) the form of
                    the  Purchase  Agreements,  Advisory Agreement, PR Agreement
                    and Business Development Agreement, (ii) treasury directions
                    dated  June  20,  2003  with  respect  to  certificates
                    representing  the  Placement  Shares,  Retainer  Shares, Fee
                    Shares  and  PR  Shares,  (iii)  a  form  of the certificate
                    representing  the  Broker  Warrants,  PR  Warrants  and  DSS
                    Warrants,  (iv) a form of direction dated June 23, 2003 from
                    the  Agent  with  respect to the Retainer Shares, Fee Shares
                    and  Broker Warrants, (v) a form of direction dated June 23,
                    2003  from Sunrise Financial Group, Inc. with respect to the
                    PR  Warrants  and  PR  Shares, (vi) a form of direction from
                    iSimplify  LLC  dated  June  23,  2003  with  respect to the
                    Business  Development Shares, (vii) a form of direction from
                    Atul  Parikh  dated  January  2,  2003 in respect of the DSS
                    Warrants,  (viii)  the  Good Harbor Agreement, (ix) forms of
                    resolutions  of  the  board of directors of the Company with
                    respect to the transactions referred to above, and (x) forms
                    of  the  securities  referred  to  above  in  the  opening
                    paragraph;  (other  than  certificates representing the Good
                    Harbor  Warrants);

               (b)  we have examined originals, photocopies, certified copies of
                    facsimiles  of such public records and certificates and have
                    considered  such questions of law as we have deemed relevant
                    and  necessary  in  order  to render the opinion hereinafter
                    expressed;

               (c)  we  have  assumed the documents referred to in paragraph (a)
                    have been duly executed and delivered by all parties thereto
                    and  the  genuineness of all signatures and the authenticity
                    of  all  documents submitted to us as photostatic, certified
                    or facsimile copies and the authenticity of the originals of
                    all  photostatic  or  facsimile  copies;

               (d)  we  have  assumed  original  copies of the executed Purchase
                    Agreements,  Advisory  Agreement,  PR  Agreement,  Business
                    Development  Agreement,  Broker  Warrants,  PR Warrants, DSS
                    Warrants,  Good  Harbor Agreement and directions referred to
                    above in paragraph (a) are in the form provided to us by the
                    Company,  and


                                      -2-

               Lang  Michener

               BARRSTERS& SOLICITORS - PATENT & TRADE MARK AGENTS


                    the  accuracy  of  the  representation  and  warranties  and
                    compliance  with  the  covenants of the parties thereto; and
                    that  the certificates representing the Good Harbor Warrents
                    will  be  in  the form provided in the officers' certificate
                    referred  to  in  paragraph  (h)  below;

               (e)  we  have  assumed that each holder of securities referred to
                    above  is  resident of the jurisdiction noted in the address
                    marked  on  certificates  for  such  securities and where no
                    address  is  marked,  that  such holder is not a resident of
                    Canada;

               (f)  we have assumed that the Agent did not engage or hold itself
                    out  as  engaging  in  Ontario in the business of trading in
                    securities  in connection with the issuance of the Placement
                    Shares;

               (g)  we  have  assumed (and are not opining) that the issuance of
                    all  securities  referred  to  above complied in all respect
                    with all requirements of applicable securities legislation;

               (h)  for  the  purposes  of  our  opinion in paragraph 1, we have
                    relied  exclusively a certificate of status issued under the
                    Business Corporations Act (Ontario) dated June 13, 2003; and

               (i)  as  to  certain  matters of fact, we have relied solely on a
                    certificate  from  the Chief Executive Officer and the Chief
                    Executive  Officer  of  the  Company  dated  July  21,2003;

               Although  we  are  qualified  to practice law in the Provinces of
               Ontario  and  British  Columbia,  our opinions are limited to the
               laws  and  of  the  Province  of  Ontario and the federal laws of
               Canada  applicable  therein.

               Based  and  relying  upon and subject to the foregoing and to the
               qualifications  herein  expressed, we are of the opinion that:


               1.   The  Company is a corporation incorporated under the laws of
                    Ontario,  Canada  and  has  not  been  dissolved.

               2.   The Placement Shares, Retainer Shares, Fee Shares, PR Shares
                    and  Business  Development Shares have been duly and validly
                    issued,  as  fully  paid  and  non-assessable  shares in the
                    capital  of  the  Company.

               3.   The Warrant Shares, when issued in accordance with the terms
                    of  the  Broker  Warrants,  will be duly and validly issued,
                    fully  paid  and  non  assessable.

               4.   The  PR  Warrant  Shares, when issued in accordance with the
                    terms  of  the PR Warrants, will be duly and validly issued,
                    fully  paid  and  non  assessable.

               5.   The  DSS  Warrant Shares, when issued in accordance with the
                    terms  of the DSS Warrants, will be duly and validly issued,
                    fully  paid  and  non  assessable.

               6.   The  Good  Harbor  Warrant Shares, when issued in accordance
                    with  the  terms  of the Good Harbor Warrants (if and when a
                    certificate  representing  the  Good Harbor Warrants (if and
                    when  a certificate representing the Good Habour Warrants is
                    issued),  will  be  duly  and validly issued, fully paid and
                    non-assessable.


                                       -3-

               Lang  Michener

               BARRSTERS& SOLICITORS - PATENT & TRADE MARK AGENTS



               We hereby consent to the use of this opinion as an Exhibit to the
               Registration  Statement  of  the  Company on Form F-3 to be filed
               under  the  United  States  Securities  Act  of  1933, as amended
               relating  to  the  registration  of the securities referred to in
               paragraphs  2, 3, 4, 5 and 6 above. In giving this opinion, we do
               not  thereby  admit  that  we  are within the category of persons
               whose consent is required under Section 7 of the Act or the Rules
               and  Regulations  of  the  Securities  and  Exchange  Commission.

               Yours  very  truly,




               (SIGNED)  LANG  MICHENER





                                       -4-