Definition ∞ Many-time signatures are cryptographic signature schemes that permit a single private key to generate multiple valid signatures without compromising security. This contrasts with one-time signature schemes, which are secure only for a single use. While generally less efficient than standard elliptic curve digital signatures, many-time schemes offer distinct security properties and can be useful in specific blockchain applications requiring repeated signing by a fixed entity. They balance reusability with cryptographic security considerations.
Context ∞ The use of many-time signatures is a specialized topic in blockchain cryptography, often explored in contexts where quantum resistance or specific security trade-offs are paramount. Discussions typically involve balancing the security guarantees of these schemes against their computational overhead and signature size compared to more common digital signature algorithms. Future research may lead to more efficient many-time signature constructions or their application in niche blockchain environments demanding particular security characteristics.
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