Crypto Shield Hookup Guide
This Tutorial is Retired!
This tutorial covers concepts or technologies that are no longer current. It's still here for you to read and enjoy, but may not be as useful as our newest tutorials.
jbdatko, 
CaseyTheRobot 
ATAES132 EEPROM
The Atmel AES132 is an AES encrypted EEPROM that can store up to 32Kb of data. Specifically, it uses AES with a 128 bit key in CCM mode.
Using the ATAES132 under Linux
There is currently no Linux driver that uses the crypto features of this device. However, it may work with the generic EEPROM drivers as, without the crypto features turned on, it acts as a general purpose EEPROM.
Using the ATAES132 with an AVR
Atmel provides a library for AVR based systems. It won't build in the Arduino IDE but it should work with Atmel Studio.
The device acts like a normal EEPROM without the crypto features turned on, so you could use it with an I2C EEPROM Library in the Arduino IDE.