Thursdays the Patent Office publishes new pending patent applications. Both of today's Spotlight Applications concern aspects of digital rights management and both are assigned to Sony. The first application discloses DRM techniques for live streaming based on trusted relationships. The second application discloses a security module that is provided in a data recording medium, data to be written to the data recording medium is encrypted with an content key different from one data to another, and the content key is safely stored in the security module.
20130238896, "Digital rights management for live streaming based on trusted relationships," assigned to Sony Network Entertainment International LLC
Managing digital rights of content based on trusted relationships including: tagging the content as using encryption and specifying a retrieval method that is used to request a decryption key so that the content is live streamed to a client device a client device; transmitting an affiliation token to a trusted agent, wherein the trusted agent relays the affiliation token onto the client device based on requirement and identifier of the client device; receiving a request from the client device for the decryption key, which includes a value from the affiliation token to identify the trusted relationships; and verifying the request and providing the decryption key to the client device, wherein the client device uses the decryption key to decrypt the live streaming content for playback. Keywords include digital rights management and trusted relationship.
20130239174, "Data transmitting system and method, drive unit, access method, data recording medium, recording medium producing apparatus and method," assigned to Sony (JP).
A security module is provided in a data recording medium, data to be written to the data recording medium is encrypted with an content key different from one data to another, and the content key is safely stored in the security module. Also, the security module makes a mutual authentication using the public-key encryption technology with a drive unit to check that the counterpart is an authorized (licensed) unit, and then gives the content key to the counterpart, thereby preventing data from being leaked to any illegal (unlicensed) unit. Thus, it is possible to prevent copyrighted data such as movie, music, etc. from being copied illegally (against the wish of the copyrighter of the data).