pysodium

import pysodium import os # --- Secret-key encryption (Symmetric) --- # Generate a random 32-byte secret key secret_key = pysodium.randombytes(pysodium.crypto_secretbox_KEYBYTES) # Generate a unique 24-byte nonce for each message (can be public) nonce = pysodium.randombytes(pysodium.crypto_secretbox_NONCEBYTES) message = b"This is a super secret message for Bob." # Encrypt the message ciphertext = pysodium.crypto_secretbox(message, nonce, secret_key) print(f"Original message: {message.decode()}") print(f"Ciphertext (hex): {ciphertext.hex()}") # Decrypt the message try: decrypted_message = pysodium.crypto_secretbox_open(ciphertext, nonce, secret_key) print(f"Decrypted message: {decrypted_message.decode()}") except pysodium.exceptions.BadSignatureError: print("Decryption failed: Message tampered or incorrect key/nonce.") # --- Public-key cryptography (Asymmetric) --- # Generate a key pair for Alice alice_public_key, alice_secret_key = pysodium.crypto_box_keypair() # Generate a key pair for Bob bob_public_key, bob_secret_key = pysodium.crypto_box_keypair() print(f"\nAlice's Public Key: {alice_public_key.hex()}") print(f"Bob's Public Key: {bob_public_key.hex()}")