The common encryption standards of digital signature using block cipher algorithm are DES, TRIPL-DES, RC2, RC4, CAST, etc.

Common encryption standards for digital signatures using public key cryptography are RSA, DSA, etc.

Digital signature refers to encrypting data (messages, bills, etc.). ) by using a cryptographic algorithm to generate a message, which is appended to the original text and sent together. This information is similar to the signature or seal in reality, and the receiver verifies it to judge the authenticity of the original text.

The general encryption standards of hash algorithm digital signature are: SHA- 1, MD5, etc.

Custom algorithms: X.509 digital certificate, XML digital signature, etc.