Minimum disclosure proofs of knowledge

Minimum Disclosure Proofs of Knowledge

Protocols are given for allowing a “prover” to convince a “verifier” that the prover knows some verifiable secret information, without allowing the verifier to learn anything about the secret. The secret can be probabilistically or deterministically verifiable, and only one of the prover or the verifier need have constrained resources. This paper unifies and extends models and techniques previo...

Minimum-Knowledge Interactive Proofs for Decision Problems

Quantum Proofs of Knowledge

We motivate, define and construct quantum proofs of knowledge, that is, proofs of knowledge secure against quantum adversaries. Our constructions are based on a new quantum rewinding technique that allows us to extract witnesses in many classical proofs of knowledge. We give criteria under which a classical proof of knowledge is a quantum proof of knowledge. Combining our results with Watrous’ ...

Strong Proofs of Knowledge

The concept of proofs-of-knowledge, introduced in the seminal paper of Goldwasser, Micali and Rackoff, plays a central role in various cryptographic applications. An adequate formulation, which enables modular applications of proofs of knowledge inside other protocols, was presented by Bellare and Goldreich. However, this formulation depends in an essential way on the notion of expected (rather...

Proofs of Zero Knowledge

We present a protocol for verification of “no such entry” replies from databases. We introduce a new cryptographic primitive as the underlying structure, the keyed hash tree, which is an extension of Merkle’s hash tree. We compare our scheme to Buldas et al.’s Undeniable Attesters and Micali et al.’s Zero Knowledge Sets. In the following, the term database refers to a system supplying the simpl...