Keyczar is a cryptographic toolkit designed to
make it easier and safer for developers to use
cryptography in their applications. It supports
authentication and encryption with both symmetric
and asymmetric keys. Cryptography is easy to get
wrong. Developers can choose improper cipher
modes, use obsolete algorithms, compose primitives
in an unsafe manner, or fail to anticipate the
need for key rotation. Keyczar abstracts some of
these details by choosing safe defaults,
automatically tagging outputs with key version
information, and providing a simple programming
interface.
