Memory specialists Micron has just announced the world's first serial NOR flash interface with replay-protected monotonic counter (RPMC). RPMC is a security feature that prevents a "message" from being replayed over and over again.
Micron has a write-up here explaining the importance and the basic principle of cryptography. Basically RPMC ensures that the message is "fresh", to prevent it from being manipulated. For example, in a bank, when funds are transmitted from account A to B, the message is signed and authenticated. However, if there is no way to ensure that the message is "fresh", someone who is manipulating the system can resend the message over and over again, transmitting more and more funds from account A to B.
The RPMC enhances preboot security and facilitates nonvolatile data storage, making the system resistant to rollback and replay attacks.
The Micron 64MB N25Q device is available in SO8W and W-DFN 0.8mm and s validated for future Intel Ultrabook platforms.