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her cebe bedava kontor y�kleme f�rsat�
by ekgelirler＠yahoo.com 17 Oct '02

17 Oct '02

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Re: One time pads
by Sam Ritchie 17 Oct '02

17 Oct '02

ACTUALLY, quantum computing does more than just halve the effective key length. With classical computing, the resources required to attack a given key grow exponentially with key length. (a 128-bit key has 2^128 possibilities, 129 has 2^129, etc. etc. you all know this...) With quantum computing, however, the complexity of an attack grows only polynomially. Hence a MUCH MUCH more agreeable time frame for brute force attacks. Good stuff, eh? ~SAM > From: "Trei, Peter" <ptrei(a)rsasecurity.com> > Date: Wed, 16 Oct 2002 14:50:03 -0400 > To: David Howe <DaveHowe(a)gmx.co.uk>, "Email List: Cypherpunks" > <cypherpunks(a)lne.com>, "'David E. Weekly'" <david(a)weekly.org> > Subject: RE: One time pads > >> David E. Weekly[SMTP:david@weekly.org] >> >> Naive question here, but what if you made multiple one time pads (XORing >> them all together to get your "true key") and then sent the different pads >> via different mechanisms (one via FedEx, one via secure courier, one via >> your best friend)? Unless *all* were compromised, the combined key would >> still be secure. >> >> As for PKI being secure for 20,000 years, it sure as hell won't be if >> those >> million-qubit prototypes turn out to be worth their salt. Think more like >> 5-10 years. In fact, just about everything except for OTP solutions will >> be >> totally, totally fucked. Which means that you should start thinking about >> using OTP *now* if you have secrets you'd like to keep past when an >> adversary of yours might have access to a quantum computer. I'd put 50 >> years >> as an upper bound on that, 5 years as a lower. >> >> -d >> > Not quite right. My understanding is that quantum > computing can effectively halve the length of a > symmettric key, but that does not take it down to zero. > > Thus, a 256 bit key would, in a QC world, be as secure > as a 128 bit key today, which is to say, pretty good. > > It's the asymmetric algorithms which have problems. > > Peter

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Re: commericial software defined radio (to 30 Mhz, RX only)
by Morlock Elloi 17 Oct '02

17 Oct '02

> Does this run on linux? Also, if regular cheapo PC sounboards can digitize 30 MHz (and Nyquist says this requires 60 MHz sampling rate) then some product managers need ... flogging. ===== end (of original message) Y-a*h*o-o (yes, they scan for this) spam follows: Faith Hill - Exclusive Performances, Videos & More http://faith.yahoo.com

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RE: One time pads and Quantum Computers
by Bill Stewart 16 Oct '02

16 Oct '02

> > David E. Weekly[SMTP:david@weekly.org] > > As for PKI being secure for 20,000 years, it sure as hell won't be if > > those million-qubit prototypes turn out to be worth their salt. > > Think more like 5-10 years. In fact, just about everything except > > for OTP solutions will be totally, totally fucked. At 02:50 PM 10/16/2002 -0400, Trei, Peter wrote: >Not quite right. My understanding is that quantum >computing can effectively halve the length of a >symmettric key, but that does not take it down to zero. >Thus, a 256 bit key would, in a QC world, be as secure >as a 128 bit key today, which is to say, pretty good. >It's the asymmetric algorithms which have problems. Yeah. What we have to do for that is start thinking about ways to apply Kerberos and similar technologies to real-world problems besides the inside-an-organization ones they were originally designed for. > David E. Weekly[SMTP:david@weekly.org] > > Which means that you should start thinking about > > using OTP *now* if you have secrets you'd like to keep past when an > > adversary of yours might have access to a quantum computer. ... OTPs won't help a bit for that problem. They're fine for transmitting new data if you've already sent a pad, but they're useless for storing secrets, because you can only decrypt something if you've got the pad around, and you have to burn the pad after use. Storing the encrypted secret message on your regular computers while keeping the pad locked up in the safe is unlikely to be any more convenient than keeping the plaintext locked up in the safe. I suppose you could secret-share a one-time-pad, but you could just as easily secret-share the secret message.

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Do you hava a problem with Spam?
by Rahmon Bigornia 16 Oct '02

16 Oct '02

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sniping as performance art
by Major Variola (ret) 16 Oct '02

16 Oct '02

> From: "Trei, Peter" <ptrei(a)rsasecurity.com> > I fail to see how anyone, anytime, anywhere, can support > the hunting of random non-consenting humans for sport. Maybe its a PETA activist making a point...

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RE: For everything else, there's MasterCard.
by Trei, Peter 16 Oct '02

16 Oct '02

> Major Variola (ret)[SMTP:mv@cdc.gov] writes: > > Rifle and scope: $1,200 > Box of .223 Hollowpoint: $6.99 > Tarot Deck: $2.95 > Scoring an FBI analyst: priceless > Some things are priceless. For everything else, there's MasterCard. > Dedicated to Eunice "Squeal Like a Pig" Stone > I fail to see how anyone, anytime, anywhere, can support the hunting of random non-consenting humans for sport. Peter Trei

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Refinancing Good People With Damaged Credit
by Direct_Lenders7153p64＠yahoo.com 16 Oct '02

16 Oct '02

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(no subject)
by Hisham755674＠bigfoot.com 15 Oct '02

15 Oct '02

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Digital Identity Forum programme
by R. A. Hettinga 15 Oct '02

15 Oct '02

--- begin forwarded text Status: RO User-Agent: Microsoft-Entourage/10.1.0.2006 Date: Mon, 14 Oct 2002 15:16:44 +0800 Subject: Digital Identity Forum programme From: "David G.W. Birch" <dgw-lists(a)birches.org> To: Bob Hettinga <rah(a)shipwright.com> Cc: Digital Bearer Settlement List <dbs(a)philodox.com> Hi Bob, Here's a more detailed plug for the Forum. Please feel free to post it anywhere you think folks might be interested. The 3rd Annual Consult Hyperion Digital Identity Forum will be held in London on November 12th and 13th 2002. Thanks to our sponsors, it will cost only UKP595 plus VAT for two days of discussion, debate and learning at the forefront of the digital identity field. This year's theme will be the balance between security and privacy in the post-September 11th world because public and private sectors have choices to make in the implementation of the identity and authentication schemes that are necessary to evolve the online world, but these choices are not context-free. The event, sponsored by RSA Security with support from Cybersource, PayPal and American Express is complementary to the annual Digital Money Forum and is a place to share knowledge across the field of digital identity: not simply the technical aspects of certificates, biometrics, smart cards and so on, but the business and social aspects that will shape this emerging field. The speakers will therefore include legal personnel, IT specialists, private and public sector experts, law enforcement personnel, a psychologist and others. For more information and the up-to-date programme please see http://www.digitalidforum.com/ Confirmed speakers already include: Steve Marsh, Director of Security Policy for the UK Government's e-Envoy. Laurent Beslay from the EC Joint Research Centre in Seville. Jof Walters, a strategist with online bank Egg. Ian Walden from the Institute of Computer & Communications Law in London. Andre Durand from Digital ID World in the US. Gabi Vago of Fortress. Clare Lees from the Henley Centre, experts on public attitudes. Psychologist and expert on virtual identity, Kristina Downing-Orr. Simon Pugh of MasterCard, a Liberty Alliance board member. Peter Dalziel from the Royal Bank of Scotland. Bill Perry, an advisor to the UK Passport Office. Caspar Bowden from Microsoft UK, an expert on security and privacy in context. Hope to see you there. Regards, Dave Birch. -- -- My own opinion (I think) given solely in my capacity -- as an interested member of the general public. -- -- mail dgw(at)birches.org, web http://www.birches.org/dgwb --- end forwarded text -- ----------------- R. A. Hettinga <mailto: rah(a)ibuc.com> The Internet Bearer Underwriting Corporation <http://www.ibuc.com/> 44 Farquhar Street, Boston, MA 02131 USA "... however it may deserve respect for its usefulness and antiquity, [predicting the end of the world] has not been found agreeable to experience." -- Edward Gibbon, 'Decline and Fall of the Roman Empire' --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to majordomo(a)wasabisystems.com

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