Python implements an example of a method for encrypting and decrypting strings

This article illustrates the implementation of Python to encrypt and decrypt strings. I will share it with you for your reference as follows:

The requirement is to store the password in the database, so encryption and decryption are reversible, and no special characters are allowed in the database to prevent errors in database backup and recovery.

The installation PyCrypto , you can use AES and DES. I used DES to encrypt and decrypt. After encryption, the ciphertext is converted to hexadecimal and stored. The test code is as follows.

; html-script: false ]#!/bin/python
#-*- coding:utf-8 -*-
# Filename:
# Revision:
# Date:    2013-06-07
# Author:   simonzhang
# web:     www.simonzhang.net
# Email:    simon-zzm@163.com
### END INIT INFO
# easy_install PyCrypto
from binascii import b2a_hex, a2b_hex
from Crypto.Cipher import DES
key = '12345678' # The length has to be 8 bit 
text = 'simonzhang.net ' # The length has to be 8 A multiple of , I filled in the blanks 
#  instantiation 
obj = DES.new(key)
#  encryption 
cryp = obj.encrypt(text)
pass_hex = b2a_hex(cryp)
print pass_hex
print '=' * 20
#  decryption 
get_cryp = a2b_hex(pass_hex)
after_text = obj.decrypt(get_cryp)
print after_text

PS: about encryption and decryption interested friends can also refer to the website online tools:

MD5 online encryption tool:
http://tools.ofstack.com/password/CreateMD5Password

Thunderbolt, express, and whirlwind encryption/decryption tools:
http://tools.ofstack.com/password/urlrethunder

Online hash/hash algorithm encryption tool:
http://tools.ofstack.com/password/hash_encrypt

MD5/hash/ SHA-1 / SHA-2 / SHA-256 / SHA-512 / SHA-3 / RIPEMD-160 encryption tools:
http://tools.ofstack.com/password/hash_md5_sha

Online sha1 sha224 / sha256 sha384 / sha512 encryption tools:
http://tools.ofstack.com/password/sha_encode

More about Python related topics: interested readers to view this site "Python coding skills summary", "Python data structure and algorithm tutorial", "Python Socket programming skills summary", "Python function using techniques", "Python string skills summary", "Python introduction and advanced tutorial" and "Python file and directory skills summary"

I hope this article is helpful for you to design Python program.