Re: "patent free(?) anonymous credential system pre-print" - asimpleattack and other problems

2002-11-07 Thread Stefan Brands
Hello Jason: >"Page 193 and 210 do talk about having an identifying >value encoded in the credentials which the holder can >prove is or isn't the same as in other credentials. However, >the discussion on page 193 is with respect to building >digital pseudonyms" No, not at all. The paragraph o

Re: "patent free(?) anonymous credential system pre-print" - a simpleattack and other problems

2002-11-05 Thread Jason Holt
(Re: my paper at http://eprint.iacr.org/2002/151/ ) Stefan Brands wrote: > - The system is subject to a simple attack. The problem lies with the > multiplication of the hashes. Let's take the Chaum blinding as an [...] (For our readers at home, that was the vulnerability I mentioned in

Re: patent free(?) anonymous credential system pre-print

2002-11-05 Thread Nomen Nescio
Stefan Brands writes regarding http://eprint.iacr.org/2002/151/: > The paper shows some promise but, apart from being insecure, has other > drawbacks that should be addressed: > > ... My work... introduced by myself... my MIT press book... > > In addition to various other drawbacks pointed out by

Re: patent free(?) anonymous credential system pre-print

2002-10-30 Thread Adam Back
Some comments on this paper comparing efficiency, and functionality with Camenisch, Chaum, Brands. On Tue, Oct 29, 2002 at 11:49:21PM +, Jason Holt wrote: > http://eprint.iacr.org/2002/151/ > > It mentions how to use the blinding technique Ben Laurie describes > in his Lucre paper, which I do

patent free(?) anonymous credential system pre-print

2002-10-29 Thread Jason Holt
I've submitted a pre-print of my anonymous credential system to the IACR ePrint server. Thanks to all of you who responded to the questions I posted here while working on it. I'd love to hear feedback from any and all before I sumbit it for publication; particularly, I want to make sure I haven'