Exhibit 15.2
| 12 York Gate Regent’s Park London NW1 4QS United Kingdom | Telephone +44 (0)20 7486 0111 Fax +44 (0)20 7935 6852 | Email email@blickrothenberg.com Web www.blickrothenberg.com |  |
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in the Registration Statements on Form S-8 (File Nos. 333-120841; 333-109915; 333-91330; 333-11530; 333-09134; 333-06098 and 333-135450) of Aladdin Knowledge Systems Ltd. (the “Company), of our report dated July 2, 2007 with respect to the consolidated financial statements of the Company included in this Annual Report on form 20-F for the year ended December 31, 2006.
| BLICK ROTHENBERG Chartered Accountants Registered Auditors | 12 York Gate Regent’s Park London NW1 4QS |
October 15, 2007
| Bob Rothenberg MBE | Mark Hart | Alan Pearce* | Chris Shepherd |
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| Angela Beech* | Darren Jordan | David Rothenberg | Simon Wagman | ||
| Jim Brown | Martin Korn | Andrew Sanford |
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| Steven Bruck | Colin Lehmann | Mike Scoltock | Consultant | ||
| Rajiv Gunesh | Simon Mayston | Nilesh Shah | Martin Donn* | ||
| Anne Healy-McAdam* | John Newman | Tim Shaw |
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| *Non Chartered Accountant | ||||
| Blick Rothenberg is authorised and regulated by the Financial Services Authority to carry on Investment business | |||||