Patent ID: 9531686
Filing Date: 2016-12-27
CPC Classification: G06F,H04B,H04L

Claim Text:
1. A method for permitting playback of digital content comprising: retrieving a list of encrypted digital content at a portable device, wherein the encrypted digital content includes a plurality of content types, the plurality of content types including a first content type and a second content type, and wherein the first content type is encrypted using a first encryption scheme and the second content type is encrypted using a second encryption scheme; identifying each of a plurality of items of encrypted digital content on the retrieved list as being of a first content type or a second content type; decrypting a second content type using a first key maintained at a firmware level; decrypting a first content type item using a second key maintained at the firmware level when the first content type item satisfies a plurality of content play rules, wherein the content play rules require location of the portable device within one or more predefined locations; and permitting playback of the decrypted second content type items and the decrypted first content type items on the portable device, wherein playback of each content type items is permitted until at least one content play rule has been violated.