作者:
T. C. Wu， S. L. Chou and T. S. Wu
关键词:
Digital multisignature ； Discrete logarithms ； Factorization ； ID-based cryptosystem ； One-way hashing function
摘要:
Based on the difficulty of factorization problem, two ID-based digital multisignature protocols are proposed, one suitable for the sequential architecture and the other for the broadcasting architecture. Both protocols have common characteristics: (1) the size of multisignature is fixed, despite the number of participants increasing; (2) it is easy to implement the multisignature generation and verification procedures; (3) the key management among participants is simplified. As for the sequential multisignature protocol, it additionally has the following characteristics: (4) the signing order (if necessary) can be flexibly defined by the system or the document issuer in advance, without affecting the predefined setup parameters; (5) each signer can easily verify the partial multisignature produced by all preceding signers; also, each signer can check whether all preceding signers have indeed signed the document.
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