July 2001 - cypherpunks-legacy

Declan misses the mark on ecash
by lcs Mixmaster Remailer 09 Jul '01

09 Jul '01

Declan McCullagh reports in Wired Online, http://www.wired.com/news/ebiz/0,1272,44507,00.html: The more important patent for digital cash, titled "Blind signature systems," was granted in July 1988 and expires in July 2005. Chaum's method preserved anonymity through a statistical technique. It can be thought of this way: A customer of a virtual bank would create a $1 coin by sending, say, 100 coins with random serial numbers first stuffed into electronic envelopes. The bank randomly would open 99 of the 100 envelopes to verify that the denominations were in fact $1 and the customer wasn't trying to commit fraud. After the bank owner was satisfied that the last remaining envelope was likely to be a $1 denomination too, the bank would sign the envelope -- marking it as digital cash -- and return it unopened. Of course this is a completely incorrect description of Chaum's cash system as it has been fielded in DigiCash and eCashTechnologies. It is a botched attempt to describe the "cut and choose" mechanism. But that was only designed for an offline cash system. The purpose of cut and choose was to check that the customer had properly encoded *his identity* in the cash, not that the denomination was correct as is described here. The reason the customer encoded his identity was that if he then double-spent, the bank could determine after the fact which customer had done it because double-spending would reveal his identity. But of course DigiCash was always implemented as an online system, where double-spending is not possible, since coins are always verified at the time they are spent. It never used a cut and choose mechanism for withdrawals, which would have been painfully inefficient. Instead, the customer simply sent one "enveloped" version of a random serial number to the bank. The bank signed the envelope, and the type of signature determined the denomination of the coin. The customer then took the serial number out of the envelope to get his cash. It's far simpler than the description above would suggest. The article also contains a recap of the Chaum/Brands patent wars. It would have been more interesting if there were some reference to new approaches to ecash that avoid the patents, such as the Lucre software by Ben Laurie, based on David Wagner's blinding (http://anoncvs.aldigital.co.uk/lucre/) or the recent proposal at Eurocrypt for a cash/credential system based on zero knowledge proofs without blinding (http://eprint.iacr.org/2001/019.ps or .pdf).

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Internet Stock Survey
by "Stock Survey <info＠internetstocksurvey.freeserve.co.uk>"＠ssz.com 09 Jul '01

09 Jul '01

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Re: Meatspace anonymity manual
by Faustine 09 Jul '01

09 Jul '01

Sampo Syreeni <decoy(a)iki.fi> writes: > On Thu, 5 Jul 2001, Anonymous Coredump wrote: > > >THE BLACK "BLOC" The whole idea of a Black Bloc is that people wear all > >black, and stay in a tight formation. If people don't stay in formation, > >and wander around with large gaps in-between, well, that's not a black > >bloc, that's a march of anarchists wearing black. > > Now, let me get this straight...anarchists whose primary display of ideology > is to stay in tight formation? I understand that anarchy does not imply lack > of organization...but formations? Sheesh. >So are you being sarcastic or are you really failing to understand >that Black Blocs are a short-term tactic for possibly illegal >operations on the street in an environment full of police, and not >some demonstrative symbol of anarchist philosophy representing their >vision of society? Frankly, I don't see how any kind of "short-term tactic for possibly illegal operations on the street in an environment full of police" could be good for anything more than the symbolic. What did these "illegal operations" really accomplish apart from getting out a statement? Serious question. I'm just not seeing it. Making a few gestures pantomiming paramilitary operations is just plain suicidal. The bottom line is that in a protest-type situation, you're relying on the power of negative PR to keep the police from mowing you down any old time they feel like it. It doesn't matter what color you wear or how tight you march, you're still as vulnerable as anyone else if you don't have some serious, serious gear and training. And is that really the direction you're prepared to go? Think about it. A few acts of vandalism isn't exactly anything I'd call significant. And it's kind of sad that you really think anyone with real power and influence actually gives a damn about anything that happens at these protests to begin with. Sure, it keeps their PR spokesmen spinning, but otherwise it's laughed off as a total joke and annoyance. You don't have to like it to realize that's the way it is. So why not spend your time writing some useful and relevant software or books instead, something that really makes an impact. Creativity, not destruction. At any rate, it sure beats facing the prospect of rotting in jail as a political prisoner on trumped-up destruction of property charges--sending your whole life straight down the toilet for absolutely nothing. But it's your lives, do whatever you want. I'm sure you will. ~Faustine.

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.BIZ .INFO domain extensions
by NewExtensionCentral.com 09 Jul '01

09 Jul '01

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09 Jul '01

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Def Con/Black Hat: Change of Venue
by B.K. DeLongue 08 Jul '01

08 Jul '01

Hi all - My name is B.K. DeLongue. Many of you may know me as Troy McClure from Infomercials such as "Might Makes Truth" and "Re-education Is Freedom". I am coordinating all press activities for Black Hat and DefCon and just wanted to drop everyone a cautionary note. If you know of other people not on this list attending the shows or other lists where this email may be relevant, please pass it on. As you may know, Defcon has traditionally been held in Las Vegas, a city known for its respect for total anonymity and utter lack of surveillance cameras. The remote locations chosen in the past have assured participants that there was absolutely no way that recording devices, video cameras or infrared monitoring devices could ever be installed in advance by three-letter agencies. My friends, we've made a few changes this year so that we r e a l l y know we'll be secure. As believers in freedom and open expression, Defcon will be shifting venue from Las Vegas to Pyongyang, effective immediately. By moving to North Korea, we will be assured that only Approved Journalists will be writing about Defcon and that their reports will be acceptable under the guidelines put forward in the XXVII Party Congress. Our consultants from the Church® of© Scientology have advised us that not only can we control the copyright of any and all news reports generated at Defcon, but we can charge them for the privilege of doing their job, too. Accordingly, ALL journalists will be charged $50 to attend Defcon. Feel free to talk to any and all Approved Journalists. Their words and images will be appropriately edited as-needed so as to ensure 100% compliance with Party directives. See you at the parade, Troy (B.K.) This year, as you may know, we are charging EVERYONE $50 to get into Def Con. This includes reporters, journalists, television producers etc. As such, many reporters have mentioned that they will be registering for the show as regular attendees. Because I do a rigorous review of the credentials for journalists applying for Def Con press passes, I HIGHLY CAUTION you NOT to speak with anyone claiming to be a journalist that is without a Def Con press badge. Those whom I will approve for press passes will be from grassroots or mainstream media that either cover computer security on a regular basis or report on general news for a very large media outlet. It's my job to weed out the frauds, charlatans, and freeloaders. While I CANNOT GUARANTEE that these "approved" reporters will write a favourable article if you choose to speak with them, I can say that they are relatively well-known, legitimate journalists and will have to suffer the ridicule and examination by their peers and the public if they write a bad article (and may show up in Attrition.org Errata - http://www.attrition.org/errata) We have posted a set of guidelines for "approved" press to the Def Con Web site at: http://www.defcon.org/html/defcon-9-media-sponsors.html Under the heading of "Def Con Registered Press Guidlines". As you can see, broadcast journalists will only be allowed free reign (ie film/record anywhere) in the public areas (the Capture the Flag areas, Vendor areas, and DJ / Rave rooms). If you don't want to be filmed, keep an eye out for the cameras and don't be in any of those rooms when filming might be going on. Speaker presentations, however, are a different ballgame. Anyone with a camera may ONLY film the speakers. Any quick shots of the crowd or filming while pretending the camera is off will result in the Goons taking action and removing the offender from the room. So like a favorite professor of mine says "CONSTANT VIGILANCE!" Remember that while there is a computer security conference going on, Federal law enforcement has been known to be in attendance (Spot the Fed!) as well as reporters (both "approved" and rogue) who have no qualms in printing any information you happen to give them - in some cases regardless if you say "background only" or not. So if you choose to talk to a reporter, make sure they're Def Con approved and make sure you don't say ANYTHING you wouldn't want to see in the media. It could result in your "dox" being dropped to the world or worse yet an raid and arrest by said attending law enforcement

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unsubscribe
by Denio Robson 08 Jul '01

08 Jul '01

Eu quero sair dessa droga.

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by Denio Robson 08 Jul '01

08 Jul '01

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by Denio Robson 08 Jul '01

08 Jul '01

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08 Jul '01

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