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FOR MORE INFORMATION CONTACT:                    PRESS RELEASE



Lee Roth
KCSA Public Relations Worldwide
(212) 896-1209 lroth@kcsa.com


                                               FOR IMMEDIATE RELEASE

                           TIKCRO TECHNOLOGIES ADOPTS
                          SHAREHOLDER BONUS RIGHTS PLAN

Tel Aviv, Israel, September 13, 2005--Tikcro Technologies Ltd. (OTCBB: TKCRF)
(the "Company") announced today that its Board of Directors has adopted a
Shareholder Bonus Rights Plan (the "Plan") pursuant to which share purchase
bonus rights (the "Rights") will be distributed on September 26, 2005 at the
rate of one Right for each of the Company's ordinary shares held by
shareholders of record as of the close of business on that date.

The Plan is similar to plans adopted by a large number of public companies and
is intended to encourage any party interested in acquiring the Company to
negotiate with the Company's Board of Directors. Although the Plan will not
prevent a takeover of the Company, the Plan should afford the Board of
Directors a prudent means of safeguarding the interests of shareholders should
an effort be made to acquire the Company at a price that does not reflect
fair value.

The Rights will be exercisable and transferable apart from the Company's
ordinary shares only if a person or group becomes an "Acquiring Person" by
acquiring beneficial ownership of 15% or more of the Company's ordinary shares,
subject to certain exceptions set forth in the Plan, or commences a tender or
exchange offer upon consummation of which such person or group would become an
Acquiring Person. Until the Rights become exercisable, each right initially
will represent the right to buy one-half of one ordinary share of the Company
for $2.50 per share. Subject to certain conditions described in the Plan,
once the Rights become exercisable, the holders of Rights, other than the
Acquiring Person, will be entitled, for a price of $2.50, to purchase
ordinary shares having a market price of $5.00 (two times the $2.50 exercise
price), or, in other words, at one-half of the market price per share.

The Rights will expire on December 31, 2015 and are generally redeemable by the
Board of Directors, at $0.001 per Right, at any time until the tenth business
day following public disclosure that a person or group has become an Acquiring
Person.

A copy of the Shareholder Bonus Rights Plan will be filed with the Securities
and Exchange Commission.

                                      # # #

About Tikcro Technologies:
Until the closing of the Assets Transaction with STMicroelectronics in 2002,
Tikcro Technologies Ltd. (formerly known as Tioga Technologies Ltd.) developed
standard integrated circuits (ICs) for broadband communications applications.
Substantially all of its assets and related liabilities were sold to
STMicroelectronics. Tikcro is headquartered in Tel Aviv, Israel. For more
information, visit Tikcro website at www.tikcro.com.

Safe Harbor Statement
Certain of the statements contained herein may be considered forward-looking
statements that involve risks and uncertainties including, but not limited to,
risks related to the asset purchase agreement with STM and risks of operations
in Israel. Such risks and uncertainties are set forth in the Company's SEC
reports including the Company's Form 20-F. Actual results may materially
differ. We undertake no duty to update any forward-looking information.