ADAPTIVE SECURE AUTHENTICATED CHANNELS FOR DIRECT SHARING OF PROTECTED CONTENT BETWEEN DEVICES

摘要

A method for a communication device for establishing a secure authenticated channel using multiple shared keys traded with another device is described. A first shared key common to a home domain is received from a non-device entity, such as a domain manager or a trusted third party. Also, a second shared key is established with the other device. An initial integrity protection of communication relating to rights sharing between the communication device and the other device is then created using the second shared key. The integrity protection of communication relating to rights sharing between the communication device and the other device is thereafter augmented using the first shared key.