It is with great sadness that we must announce that RSA Labs has
decided to terminate the RSA Secret-Key Challenge, which impacts the
RC5-72 project and all of the remaining RC5 challenges. This means
that RSA Labs will not confirm any solutions or award any additional
prizes, should a correct solution be found. Furthermore, we have
received a statement indicating that they will not be disclosing the
solutions to the unsolved challenges. More details can be found on
http://www.rsa.com/rsalabs/node.asp?id=2100 (Note that the page should
state that the RC5-32/12/8 solution was recovered on 14 July 2002, not
28 January 1997.)
Although RSA Labs is halting their official sponsorship, there is
still the option open to us to continue the project without their
prize or validation. We would like to solicit your feedback regarding
this option. Discussion is welcome on our rc5 mailing list (see
http://lists.distributed.net/mailman/listinfo/rc5 if you are not
already a member). In the coming days, we will provide a facility to
allow official votes to be made.
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