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- DictionaryDig·it·al sig·na·ture
noun
- 1. a type of electronic signature that encrypts documents with digital codes that are particularly difficult to duplicate.
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noun
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Bob receives both the message and signature. He uses Alice's public key to verify the authenticity of the signed message.]] A digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. A valid digital signature on a message gives a recipient confidence that the message came from a sender known to the recipient. Wikipedia