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On Monotone Function Closure of Statistical Zero-Knowledge

Assume we are given a language L with an honest verifier perfect zero-knowledge proof system. Assume also that the proof system is an Arthur-Merlin game with at most 3 moves. The class of such languages includes all random self-reducible language, and also any language with a perfect zero-knowledge non-interactive proof. We show that such a ...

Linear Zero-Knowledge - A note on Efficient Zero-Knowledge Proofs and Arguments

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 ...

Deniable Encryption

Consider a situation in which the transmission of encrypted messages is intercepted by an adversary who can later ask the sender to reveal the random choices (and also the secret key, if one exists) used in generating the ciphertext, thereby exposing the cleartext. An encryption scheme is deniable if the sender can generate `fake random choices' that ...
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