USB数字传输内容保护实施

This paper describes the USB transport services and protocol formats that support Digital Transmission Content Protection (DTCP). Use of DTCP requires licensing by the Digital Transmission Licensing Administrator (DTLA).
1.2 Scope
USB CSM-2 describes the USB transport services, descriptors, and requests necessary to support DTCP protocols over USB. This document does not change or alter DTCP functionality.The Content Security Class (CSC) specification allows Content Security Methods (CSM) to define additional requests as needed. CSM-2 defines additional USB CSC requests in order to support DTCP AKE protocols between
USB Host and Device. In addition, CSM-2 implements the Content Security Notification Service and defines additional notifications that are needed to support DTCP protocols.