affine backend backends Backends Blowfish boolean Botan Changelog ciphertext committer committers conda crypto cryptographic cryptographically Debian Diffie decrypt decrypted decrypting deserialize deserialized Docstrings Encodings fernet Fernet hazmat indistinguishability initialisms interoperable introspectability invariants iOS iterable Koblitz Lange metadata naïve namespace namespaces paddings pickleable plaintext preprocessor preprocessors pseudorandom pyOpenSSL relicensed Schneier scrypt Serializers serializer Solaris Tanja testability Ubuntu unencrypted unpadded unpadding Verisign