![]() ![]() ![]() ![]() A valid digital signature on a message gives a recipient confidence that the message came from a sender known to the recipient. He uses Alice's public key to verify the authenticity of the signed message.Ī digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. Bob receives both the message and signature. Alice signs a message-"Hello Bob!"-by appending a signature computed from the message and her private key. For data record not secured by cryptographic scheme, see Electronic signature. This article is about cryptographic construct derived from a mathematical scheme which is supposed to be hard to forge. ![]()
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