>>> import hashlib
>>> hashlib.md5('123'.encode('utf-8')).hexdigest()

'202cb962ac59075b964b07152d234b70'

import base64

str = 'hello world'.encode(encoding='utf-8')

#加密

encodestr = base64.b64encode(str)

print(encodestr) #b'aGVsbG8gd29ybGQ='

print(encodestr.decode())  #aGVsbG8gd29ybGQ=

#解密

decodestr = base64.b64decode(encodestr)

print(decodestr)  #b'hello world'

print(decodestr.decode())  #hello world

#AES-demo

import base64

from Crypto.Cipher import AES

'''

采用AES对称加密算法

'''

# str不是16的倍数那就补足为16的倍数

def add_to_16(value):

    while len(value) % 16 != 0:

        value += '\0'

    return str.encode(value)  # 返回bytes

#加密方法

def encrypt_oracle():

    # 秘钥

    key = ''

    # 待加密文本

    text = 'abc123def456'

    # 初始化加密器

    aes = AES.new(add_to_16(key), AES.MODE_ECB)

    #先进行aes加密

    encrypt_aes = aes.encrypt(add_to_16(text))

    #用base64转成字符串形式

    encrypted_text = str(base64.encodebytes(encrypt_aes), encoding='utf-8')  # 执行加密并转码返回bytes

    print(encrypted_text)

#解密方法

def decrypt_oralce():

    # 秘钥

    key = ''

    # 密文

    text = 'qR/TQk4INsWeXdMSbCDDdA=='

    # 初始化加密器

    aes = AES.new(add_to_16(key), AES.MODE_ECB)

    #优先逆向解密base64成bytes

    base64_decrypted = base64.decodebytes(text.encode(encoding='utf-8'))

    #

    decrypted_text = str(aes.decrypt(base64_decrypted),encoding='utf-8') # 执行解密密并转码返回str

    print(decrypted_text)

if __name__ == '__main__':

   # encrypt_oracle()

    decrypt_oralce()

 import rsa

 key = rsa.newkeys(3000)#生成随机秘钥

 privateKey = key[1]#私钥

 publicKey = key[0]#公钥

 message ='sanxi Now is better than never.'

 print('Before encrypted:',message)

 message = message.encode()

 cryptedMessage = rsa.encrypt(message, publicKey)

 print('After encrypted:\n',cryptedMessage)

 message = rsa.decrypt(cryptedMessage, privateKey)

 message = message.decode()

 print('After decrypted:',message)