Keyczar is an open source cryptographic toolkit designed to make it easier
and safer for developers to use cryptography in their applications.
Keyczar supports authentication and encryption with both symmetric and
asymmetric keys.

Some features of Keyczar include:

- A simple API
- Key rotation and versioning
- Safe default algorithms, modes, and key lengths
- Automated generation of initialization vectors and ciphertext signatures
- Keyczar was originally developed by members of the Google Security Team