[122354] in cryptography@c2.net mail archive
RE: New result in predicate encryption: disjunction support
daemon@ATHENA.MIT.EDU (Scott Guthery)
Sat May 3 19:51:21 2008
From: "Scott Guthery" <sbg@acw.com>
To: "'Ivan Krstic'" <krstic@solarsail.hcs.harvard.edu>,
"'Cryptography'" <cryptography@metzdowd.com>
Date: Sat, 3 May 2008 18:18:20 -0400
In-Reply-To: <28180171-D719-45AC-82A4-929A60E701A0@solarsail.hcs.harvard.edu>
Those interested in predicate encryption might also enjoy
Group Authentication Using The Naccache-Stern Public-Key Cryptosystem
http://arxiv.org/abs/cs/0307059
which takes a different approach and handles negation.
A group authentication protocol authenticates pre-defined groups of
individuals such that:
- No individual is identified
- No knowledge of which groups can be successfully authenticated is known to
the verifier
- No sensitive data is exposed
The paper presents a group authentication protocol based on splitting the
private keys of the Naccache-Stern public-key cryptosystem in such a way
that the Boolean expression defining the authenticable groups is implicit in
the split
Shamelessly, Scott
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