libnacl

import libnacl.public # Define a message to send (must be bytes) msg = b'You\'ve got two empty halves of coconut and you\'re bangin\' \'em together.' # Generate the key pairs for Alice and Bob bob = libnacl.public.SecretKey() alice = libnacl.public.SecretKey() # Create Box objects representing the combination of sender's secret key and receiver's public key bob_box = libnacl.public.Box(bob.sk, alice.pk) alice_box = libnacl.public.Box(alice.sk, bob.pk) # Bob encrypts a message for Alice bob_ctxt = bob_box.encrypt(msg) # Alice decrypts the message from Bob bclear = alice_box.decrypt(bob_ctxt) print(f"Original message: {msg}") print(f"Decrypted message from Bob: {bclear}") # Alice encrypts a message for Bob alice_ctxt = alice_box.encrypt(msg) # Bob decrypts the message from Alice aclear = bob_box.decrypt(alice_ctxt) print(f"Decrypted message from Alice: {aclear}") assert msg == bclear assert msg == aclear