Re: Unforgeable Blinded Credentials

2006-04-05 Thread "Hal Finney"
John Gilmore writes: > > I am aware of, Direct Anonymous Attestation proposed for the Trusted > > Computing group, http://www.zurich.ibm.com/security/daa/ . > > > DAA provides > > optionally unlinkable credential showing and relies on blacklisting to > > counter credential sharing. > > Hmm, why doe

Re: Unforgeable Blinded Credentials

2006-04-05 Thread John Gilmore
> I am aware of, Direct Anonymous Attestation proposed for the Trusted > Computing group, http://www.zurich.ibm.com/security/daa/ . > DAA provides > optionally unlinkable credential showing and relies on blacklisting to > counter credential sharing. Hmm, why doesn't this blacklisting get mentione

The underhanded C contest...

2006-04-05 Thread Perry E. Metzger
Quoting from the web page: We hereby announce our second annual contest to write innocent-looking C code implementing malicious behavior. In many ways this is the exact opposite of the Obfuscated C Code Contest: in this contest you must write code that is as readable, clear, innocent and

Re: Unforgeable Blinded Credentials

2006-04-05 Thread Christian Paquin
Adam Back wrote: On Tue, Apr 04, 2006 at 06:15:48AM +0100, Ben Laurie wrote: Brands actually has a neat solution to this where the credential is unlinkable for n shows, but on the (n+1)th show reveals some secret information (n is usually set to 1 but doesn't have to be). I think they shows a

Re: Unforgeable Blinded Credentials

2006-04-05 Thread Anne & Lynn Wheeler
John Denker wrote: The phrase "there are no sensitive secrets today" sounds very strange by itself, and doesn't sound much better in context. I assume the intended meaning was more along the lines of: == The set of things you want to keep secret has zero overlap with == the set of things you

CFP International Conference on Cryptology in Vietnam (VietCrypt)

2006-04-05 Thread Perry E. Metzger
Forwarded from ias-opportunities Date: Wed, 5 Apr 2006 09:26:43 -0400 From: Marina Blanton <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Subject: [ias-opportunities] International Conference on Cryptology in Vietnam (VietCrypt) 2006 Message-ID: <[EMAIL PROTECTED]> Mime-Version: 1.0 Content-Type:

Re: Unforgeable Blinded Credentials

2006-04-05 Thread John Denker
Hal Finney wrote in part: ... Attempts to embed sensitive secrets in credentials don't work because there are no sensitive secrets today. You could use credit card numbers or government ID numbers (like US SSN) but in practice such numbers are widely available to the black hat community. The