The PiSec uses a True Random Number Generator which is used to generate safe, strong encryption keys and certificates. Internally it operates on a protected file system which uses an internal certificate to prevent unauthorized access. The processor makes use of Elliptic Curve Cryptography, which reduces the processor overhead and speeds up the verification process.
The standards that the PiSec is designed to are AES 256 – XTS and X.509 (for certificates). In addition the PiSec can automatically block access to the Raspberry Pi after a predefined number of unsuccessful attempts to gain access, which prevents brute force and DOS attacks.
PiSec can now be found at Kickstarter. More information from: http://secureraspberrypi.com.