Scott Guthery wrote:
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
I don't understand this one, could you say it again with more words?
- 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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