completes rc5-64 project (list announcement)
september 25, 2002 <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office"
HAS BEEN SOLVED!
14-Jul-2002, a relatively characterless PIII-450 in Tokyo returned the winning
key to the distributed.net keyservers. The key
produces the plaintext output:
unknown message is: some things are better left unread
due to breakage in scripts (dbaker's fault, naturally) on the keymaster, this
successful submission was not automatically detected. It sat undiscovered until
12-Aug-2002. The key was immediately submitted to RSA Labs and was verified as
the winning key.
after 1,757 days and 58,747,597,657 work units tested the winning key was found!
While it's debatable that the duration of this project does much to devalue the
security of a 64-bit RC5 key by much, we can say with confidence that RC5-64 is
not an appropriate algorithm to use for data that will still be sensitive in
more than several years' time. On the distributed computing front, however, the
RC5-64 project clearly demonstrates the viability of long-term,
volunteer-driven, internet-based collaborative efforts. The next time someone
bemoans the public's short attention span or need for instant gratification you
should remind them what 331,252 people were able to accomplish by joining
together and working for nearly five years. distributed.net's RC5-64 project
clearly shows that even the most ambitious projects can be completed by
volunteers thanks to the combined power of the internet and distributed
artificially high numbers resulting from network difficulties, we completed
86,950,894 workunits on our best day. This is 0.12% of the total keyspace
meaning that at our peak rate we could expect to exhaust the keyspace in 790
days. Our peak rate of 270,147,024 kkeys/sec is equivalent to 32,504 800MHz
Apple PowerBook G4 laptops or 45,998 2GHz AMD Athlon XP machines or (to use some
rc5-56 numbers) nearly a half million Pentium Pro 200s.
the course of the RC5-64 project, 331,252 individuals participated. We tested
apologize for the latency in the announcement, but scheduling conflicts with RSA
Laboratories and difficulties in reaching the winning participant (who has asked
to remain anonymous) introduced the additional delay to the process.
please consider joining us on SlashNET
IRC on Saturday 28-Sep-2002 @ 21:00 UTC (5:00PM EDT) for an
online Q+A session on the RC5-64 project and the future plans for the
distributed.net network. Not only are we looking forward to moving on to RC5-72
but we're currently reshaping the framework of the dnetc architecture to better
accommodate additional projects. We're hoping to attract some new and motivated
partners with good ideas and a need for cycles.
to RSA Labs for continuing to offer challenges that reward distributed efforts!
more information, contact:
McNett <email@example.com> +1-512-350-5038
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last modified: Sep 26, 2002