Intel Corporation
Link protection for trusted input/output devices

Abstract:

A system on a chip (SoC) includes memory, a processor coupled to the memory, and link protection circuitry coupled to the memory and the processor. The link protection circuitry includes an SoC encryption engine to receive first data from the memory and a first key, generate, by an SoC encryption counter of the SoC encryption engine, an SoC encryption counter value, encrypt the first data using the SoC encryption counter value and the first key to generate first encrypted data, and cause the first encrypted data to be transmitted to a device including a device decryption counter synchronized with the SoC encryption counter.