pip install pynacl python import nacl.utils from nacl.public import PrivateKey, PublicKey, Box private_key = PrivateKey.generate() public_key = private_key.public_key plaintext = b'Hello, World!' nonce = nacl.utils.random(Box.NONCE_SIZE) box = Box(private_key, public_key) ciphertext = box.encrypt(plaintext, nonce) box = Box(private_key, public_key) decrypted_data = box.decrypt(ciphertext)