- noun a piece of text in code, attached to an email, that confirms the identity of its sender
- An attachment to an electronic transmission which uniquely identifies and authenticates the sender of a message, file, or other information such as a credit card number. To be effective, an electronic signature must not be forged, and measures such as public key cryptography are employed to insure its integrity. Its abbreviation is e-signature, or esignature. Also called email signature (2), digital signature, or signature (2).
- synonymemail signature
- noun electronic text or symbols attached to a document sent by email which acts in a similar way to a handwritten signature, in that they prove the authenticity of the document