Digital signature (also known as public key digital signature, electronic signature) is a kind of ordinary physical signature similar to written on paper, but it is implemented using technology in the field of public key encryption to identify digital signatures. information method. A set of digital signatures usually defines two complementary operations, one for signing and another for verification.

A digital signature is a digital string that can only be generated by the sender of the information and cannot be forged by others. This digital string is also an effective proof of the authenticity of the information sent by the sender of the information.

Digital signature is the application of asymmetric key encryption technology and digital digest technology.