A cryptographic witness is a piece of data that proves the validity of a statement or computation without necessarily revealing the statement itself or the full details of the computation. This evidence is generated through cryptographic methods, allowing for efficient and secure verification by others. It serves as a concise attestation of correctness.
Context
Cryptographic witnesses are fundamental to zero-knowledge proofs and other privacy-preserving technologies in blockchain. They enable scaling solutions by allowing off-chain computations to be verified on-chain with minimal data. The ongoing discussion involves optimizing the size and generation time of these witnesses for wider practical application.
The introduction of Distributed Vector Commitments allows validators to cryptographically verify transactions against a short block commitment, eliminating massive state storage.
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