Python Encryption---hashlib module

What is 1.hash?

Hash is an algorithm that supports all the algorithms provided by the OpenSSL library, including MD5, SHA1, sha224, SHA256, sha384, sha512, and is very simple and convenient to use. MD5 is often used to store user passwords. SHA1 is often used as a digital signature.

Three features of 2.MD5

(1). The same content is the same as the result of the hash, the content slightly changed the hash value is changed,

(2). Irreversible push.

(3). When calculating with the same algorithm, the length of the hash value is fixed regardless of how long the data is.

Python Encryption---hashlib module