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digital signature

A cryptographic modification of data that provides: (a) origin authentication, (b) data integrity, and (c) signer nonrepudiation (when associated with a data unit and accompanied by the corresponding public-key certificate). [After X9.49] 2. [A] cryptographic process used to assure message originator authenticity, integrity, and nonrepudiation. Synonym electronic signature. [INFOSEC-99]


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