- cypherpunks-legacy - lists.cpunks.org

Slashdot | Eco-Terrorism
by Jim Choate 01 Jul '01

01 Jul '01

http://slashdot.org/science/01/07/01/1634213.shtml -- -- ____________________________________________________________________ Whereof one cannot speak, thereof one must be silent. Ludwig Wittgenstein The Armadillo Group ,::////;::-. James Choate Austin, Tx /:'///// ``::>/|/ ravage(a)ssz.com www.ssz.com .', |||| `/( e\ 512-451-7087 -====~~mm-'`-```-mm --'- --------------------------------------------------------------------

1 0

We shall fight .............
by Markku Saarelainen 01 Jul '01

01 Jul '01

I am in the U.S.A. I have been here since 1989 ... I believe in the Communist Revolution. I am in Miami and in the process of recruiting more members to my Communist Party unit here. I do it very openly .. I am not afraid of death. We must fight ... AND FIGHT NOW ... let's be Satans and we must FIGHT NOW ! http://www.funet.fi/pub/culture/russian/voices/realaudio/international.ra http://www.funet.fi/pub/culture/russian/voices/realaudio/sovietnationalanth… I have told my story on the USENET bulletin board: alt.politics.org.cia --- read my messages .. I am the main contributor. Please, email my message to all Communist Party representatives around the globe .... WE SHALL FIGHT ... WE SHALL FIGHT TO THE VERY LAST MOMENT OF OUR SOULS, HEARTS AND MINDS ... ! Markku J. Saarelainen Join 18 million Eudora users by signing up for a free Eudora Web-Mail account at http://www.eudoramail.com

1 0

Re: Zero Knowledge Identity Proofs (fwd)
by Jim Choate 01 Jul '01

01 Jul '01

---------- Forwarded message ---------- Date: Tue, 26 Jun 2001 16:00:26 -0700 From: Marc Branchaud <marcnarc(a)rsasecurity.com> To: cryptography(a)wasabisystems.com Subject: Re: Zero Knowledge Identity Proofs Well, I can't be sure that I'm not misunderstanding something either. For the most part, I agree with Dimitrios that challenges with proof of origin are part of the solution to Mafia Fraud attacks. My main point is that I don't think simply signing the challenge is enough. Let me try to restate things symbolically. Nominally, in the naive case, Dave would present Alice with a challenge, X, and Alice would transform & return the challenge: X'. This, as we know, is vulnerable to the Mafia Fraud. What I believe Dimitrios is proposing is for Dave to present both the challenge and a signature on the challenge: {X, S_dave(X)}. Then, Alice would verify that the signature corresponds to the person she thinks she's talking to, and if so she can return the transformed challenge X'. I'm essentially contending that Dave needs to verify that Alice did indeed see the challenge & signature he presented. Consider Mafia Fraud against the above scenario. Dave presents {X, S_dave(X)} to Carol, who forwards it to Bob. Now, Bob can re-sign the challenge himself, and present {X, S_bob(X)} to Alice. Alice will happily verify that the challenge comes from Bob, and return X' to Bob, who then passes it to Carol & then on to Dave. The fraud is successful, because Dave can't tell that Alice saw Bob's signature on the challenge and not his own. So the X' that Alice computes must be a function f(X, S_dave(X)) on both the challenge and the signature. (If, in the naive case, X'=S_alice(X), then to truly prevent the fraud we need X'=S_alice(X,S_dave(X)).) Now the fraud fails because Alice would compute X'=f(X, S_bob(X)), and so Dave (not Alice) would detect the fraud. So it's not enough for Dave to simply sign the challenge & for Alice to verify that signature. Alice must prove to Dave that she saw his signature and not somebody else's. BTW, without giving it any thought, I believe this scheme is safe against replay attacks (because Dave generates a new challenge every time). Does anybody have any thoughts about that? Marc --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to majordomo(a)wasabisystems.com -- ____________________________________________________________________ Whereof one cannot speak, thereof one must be silent. Ludwig Wittgenstein The Armadillo Group ,::////;::-. James Choate Austin, Tx /:'///// ``::>/|/ ravage(a)ssz.com www.ssz.com .', |||| `/( e\ 512-451-7087 -====~~mm-'`-```-mm --'- --------------------------------------------------------------------

1 0

Filtering 'spammers', one line comments, and Tim May
by Jim Choate 01 Jul '01

01 Jul '01

You reap what you sow. -- ____________________________________________________________________ Whereof one cannot speak, thereof one must be silent. Ludwig Wittgenstein The Armadillo Group ,::////;::-. James Choate Austin, Tx /:'///// ``::>/|/ ravage(a)ssz.com www.ssz.com .', |||| `/( e\ 512-451-7087 -====~~mm-'`-```-mm --'- --------------------------------------------------------------------

1 0

Key length and stopping time
by Jim Choate 01 Jul '01

01 Jul '01

Q: If it becomes possible, as some recent physics research indicates, that in some situations time can be stopped or eliminated what would the implication be with regard to estimating the time to resolve key lengths be? In other words if it becomes possible to have dynamic physical systems which operate at least in some sort of phase space with no time axis what does 'life of the universe' really mean? -- ____________________________________________________________________ Whereof one cannot speak, thereof one must be silent. Ludwig Wittgenstein The Armadillo Group ,::////;::-. James Choate Austin, Tx /:'///// ``::>/|/ ravage(a)ssz.com www.ssz.com .', |||| `/( e\ 512-451-7087 -====~~mm-'`-```-mm --'- --------------------------------------------------------------------

1 0

None
by Daniel Morin 01 Jul '01

01 Jul '01

Yes I am an agent of Satan....but my duties are largely ceremonial....

1 0

Prying Eyes
by A. Melon 01 Jul '01

01 Jul '01

Looks like we need to build some small radio-controlled blimps with paint spray guns to blind these suckers.

3 2

Slashdot | Prying Eyes of Tampa Police
by Jim Choate 01 Jul '01

01 Jul '01

I think they're trying to make Reno feel at home and let her know she's got lots of support for the governorship... http://slashdot.org/articles/01/07/01/0348226.shtml -- -- ____________________________________________________________________ Whereof one cannot speak, thereof one must be silent. Ludwig Wittgenstein The Armadillo Group ,::////;::-. James Choate Austin, Tx /:'///// ``::>/|/ ravage(a)ssz.com www.ssz.com .', |||| `/( e\ 512-451-7087 -====~~mm-'`-```-mm --'- --------------------------------------------------------------------

1 0

Key West cops arrest editor
by Brad Bradberry 01 Jul '01

01 Jul '01

How in hell did you move Key West to Cuba without the rest of the country finding out? You guys would make Fidel Castro proud.

1 0

None
by A. Łączak 01 Jul '01

01 Jul '01

Excuse me, do you know the firm in Europe which istall internet via electric lines? Arek, Poland telephone: +48 604 890 008.

2 1