Cryptology ePrint Archive: Report 1996/004
Linear Zero-Knowledge - A note on Efficient Zero-Knowledge Proofs and Arguments
Ronald Cramer and Ivan Damgaard
Abstract: We present a zero-knowledge proof system for any NP language L, which
allows showing that x is in L using communication corresponding
to $O(|x| sup c)+k$ bit commitments, with error probability $2 sup -k$,
and where c is a constant depending only on L.
The proof can be based on any bit
commitment scheme with a particular set of properties. We suggest an
efficient implementation based on factoring. The protocol allows showing
that a Boolean formula of size n is satisfiable,
with error probability $2 sup -n$, using O(n) commitments.
This is the first protocol for SAT that is linear in this sense.<br>
[The rest of the abstract was truncated and appears below -- the library.]
Category / Keywords:
Publication Info: Appeared in the THEORY OF CRYPTOGRAPHY LIBRARY and has been included in the ePrint Archive.
Date: received May 14th, 1996.
Contact author: ivan at daimi aau dk
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