AES Encrypt/Decrypt demo

aes-demo.py

import os
from Crypto.Cipher import AES

counter = os.urandom(16)
#AES keys may be 128 bits (16 bytes), 192 bits (24 bytes) or 256 bits (32 bytes) long.
key = os.urandom(32)

# AES Encrypt
enc = AES.new(key, AES.MODE_CTR, counter=lambda: counter)
encrypted = enc.encrypt("Secret")
print encrypted


# AES Decrypt
dec = AES.new(key, AES.MODE_CTR, counter=lambda: counter)
decrypted =  dec.decrypt(encrypted)
print decrypted