def decrypt(encrypted, passphrase):
    IV = ''.join(chr(x) for x in [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00])
    aes = AES.new(passphrase, AES.MODE_CBC, IV)
    decrypted = aes.decrypt(base64.b64decode(encrypted))
    return decrypted