Skip to main content

Low-Norm Witnesses

Definition

Low-norm witnesses refer to solutions to certain mathematical problems, particularly in lattice-based cryptography, that possess a small Euclidean norm. In the context of zero-knowledge proofs and cryptographic commitments, a witness is the secret information that substantiates the validity of a statement. The existence of a “low-norm witness” for a specific problem often correlates with the computational hardness assumed by the cryptographic scheme. These small solutions are critical for security assumptions.