New result in predicate encryption: disjunction support

[Ben Laurie]

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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