Electronic signature is a small electronic document used to identify identity, which exists in the form of a string containing numbers and letters. The string is unique. For example, when punching in at work, the card has an identification code similar to an electronic signature, and this unique identification code is used to confirm whether it is you or not.

Electronic signature refers to the data contained in the data message in electronic form and accompanied by data used to identify the identity of the signer and show that the signer approves its content. Generally speaking, electronic signature is an electronic signature of electronic documents through cryptographic technology, which is not a digital visualization of written signature, but similar to handwritten signature or seal, and can also be said to be an electronic seal.

Digital signature is the data obtained by encrypting the abstract of data with the private key of digital certificate to ensure the integrity, authenticity and non-repudiation of data.