On board each CryptoShield is a slew of hardware fresh for your use: a real time clock (RTC) module to keep accurate time, a trusted platform module (TPM) for RSA encryption/decryption and signing in the hardware, an AES-128 encrypted EEPROM, an ATSHA204 authentication chip that performs SHA-256 and HMAC-256, and an ATECC108 that performs the Elliptic Curve Digital Signature Algorithm (ECDSA).
This sounds like one for the wish list although I have no application in mind except a very save remote control or so. For what applications would you use this type of encryption?