Introducing PCIe's Integrity and Data Encryption Feature (IDE)
The Integrity and Data Encryption (IDE) was published in PCIe (Peripheral Component Interconnect Express) version 6.0, and it was created as a tool to protect the communication between the different devices of the PCIe topology root complex (RC), switch (SW), and endpoint (EP). The IDE layer is a new layer that was inserted between the transection layer and data link layer with the goal of protecting against threats from physical attacks on the link. The IDE will use a cryptography mechanism to encrypt all data sent for both sides.
The IDE feature has two types of streams: the link IDE stream and the selective IDE stream. The link stream, in yellow, is a security channel in the link, and the selective stream, in blue, is a security channel between devices, not necessarily in the same link.
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