This specification describes the architecture details of the Serial Peripheral Interface (SPI) bus interface enhancements to support robust and reliable replay protected monotonic counters (RPMC). These enhancements are typically targeted for a Serial Flash device that resides on the interface.
Replay Protected Monotonic Counters are used inside a secure computer system to protect valuable assets from replay attacks. These attacks involve an attacker that has physical possession of the computer system and can replay prior information on an interface to gain possession of valuable assets.
Prior to these enhancements monotonic counters stored inside the standard Serial Flash array could be easily reprogrammed to a previous value, with no ability to detect that such a change has occurred.
RPMC Serial Flash Specification rev 0 7 (client).pdf : Revision 0.7 RPMC Serial Flash Specification document
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