{"library":"pynacl","title":"PyNaCl: Python binding to the Networking and Cryptography (NaCl) library","description":"PyNaCl is a Python binding to the Networking and Cryptography (NaCl) library, providing cryptographic operations such as digital signatures, secret-key and public-key encryption, hashing, and password-based key derivation. The current version is 1.6.2, released on January 1, 2026. PyNaCl follows a regular release cadence, with updates approximately every 1-2 years.","language":"python","status":"active","last_verified":"Tue May 19","install":{"commands":["pip install pynacl"],"cli":null},"imports":["from nacl.public import PublicKeyBox","from nacl.secret import SecretBox","from nacl.signing import SigningKey","from nacl.signing import VerifyKey"],"auth":{"required":false,"env_vars":[]},"quickstart":{"code":"from nacl.public import PrivateKey, PublicKey, PublicKeyBox\n\n# Generate a private key\nprivate_key = PrivateKey.generate()\n\n# Derive the corresponding public key\npublic_key = private_key.public_key\n\n# Create a PublicKeyBox for encryption\nbox = PublicKeyBox(public_key)\n\n# Encrypt a message\nmessage = b\"Secret message\"\nencrypted = box.encrypt(message)\n\n# Decrypt the message\ndecrypted = box.decrypt(encrypted)\nprint(decrypted.decode())","lang":"python","description":"This example demonstrates how to generate a private key, derive the corresponding public key, create a PublicKeyBox for encryption, and encrypt and decrypt a message using PyNaCl.","tag":"stale","tag_description":"widespread failures or data too old to trust","last_tested":"2026-04-23","results":[{"runtime":"python:3.10-alpine","exit_code":1},{"runtime":"python:3.10-slim","exit_code":1},{"runtime":"python:3.11-alpine","exit_code":1},{"runtime":"python:3.11-slim","exit_code":1},{"runtime":"python:3.12-alpine","exit_code":1},{"runtime":"python:3.12-slim","exit_code":1},{"runtime":"python:3.13-alpine","exit_code":1},{"runtime":"python:3.13-slim","exit_code":1},{"runtime":"python:3.9-alpine","exit_code":1},{"runtime":"python:3.9-slim","exit_code":1}]},"compatibility":{"tag":"stale","tag_description":"widespread failures or data too old to 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