from Crypto.Cipher import DES3
from Crypto import Random
key = b'Sixteen byte key'
iv = Random.new().read(DES3.block_size)
cipher = DES3.new(key, DES3.MODE_OFB, iv)
plaintext = b'sona si latine loquerrt '
msg = iv + cipher.encrypt(plaintext)
ZnJvbSBDcnlwdG8uQ2lwaGVyIGltcG9ydCBERVMzCmZyb20gQ3J5cHRvIGltcG9ydCBSYW5kb20KCmtleSA9IGInU2l4dGVlbiBieXRlIGtleScKaXYgPSBSYW5kb20ubmV3KCkucmVhZChERVMzLmJsb2NrX3NpemUpCmNpcGhlciA9IERFUzMubmV3KGtleSwgREVTMy5NT0RFX09GQiwgaXYpCnBsYWludGV4dCA9IGInc29uYSBzaSBsYXRpbmUgbG9xdWVycnQgJwptc2cgPSBpdiArIGNpcGhlci5lbmNyeXB0KHBsYWludGV4dCkKCg==