N. Parr nparr at usa.net
Thu Sep 26 12:16:22 EDT 2002

Well now what do we do, hmmm.  I can't even get any OGR packets, they must
have been snatched up pretty quick.  My cycles are going to waste, ahhhh
this can't be happening, must generate heat somehow, my computer room is
cooling off!

-----Original Message-----
From: owner-rc5 at lists.distributed.net
[mailto:owner-rc5 at lists.distributed.net]On Behalf Of Sergio Ribeiro
Sent: Thursday, September 26, 2002 10:42 AM
To: rc5 at lists.distributed.net
Subject: RE: [RC5] RC5-64 HAS BEEN SOLVED

Congratulations to all.

And now... what shall we do? What's the next project? Just OGR-25?

    Sérgio Ribeiro
    Porto - Portugal

> -----Original Message-----
> From: David McNett [mailto:nugget at distributed.net]
> Sent: Thursday, September 26, 2002 4:30 PM
> To: rc5 at lists.distributed.net
> Subject: [RC5] RC5-64 HAS BEEN SOLVED
> http://www.distributed.net/pressroom/news-20020926.html
> Hash: SHA1
> distributed.net completes rc5-64 project (list announcement)
> september 25, 2002
>    On 14-Jul-2002, a relatively characterless PIII-450 in
> Tokyo returned
>    the winning key to the distributed.net keyservers. The key
>    0x63DE7DC154F4D03 produces the plaintext output:
>      The unknown message is: some things are better left unread
>    Unfortunately, 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.
>    So, 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 computing.
>    Ignoring 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.
>    Over the course of the RC5-64 project, 331,252 individuals
>    participated. We tested 15,769,938,165,961,326,592 keys.
>    We 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.
>    Also, 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.
>    Thanks to RSA Labs for continuing to offer challenges that reward
>    distributed efforts!
>    For more information, contact:
>      * David McNett <nugget at distributed.net> +1-512-350-5038
> References

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