Method of controlled access to content

摘要

A method of controlled access to content, comprising joining an access sharing network, obtaining a content item from the access sharing network which requires access control data to enable playback, obtaining the access control data, determining from the access control data that a particular other device is authorized to play back the content item, and enabling playback of the content item in accordance with the access control data upon a positive determination that said other device is a member of said access sharing network. Preferably the access control data is used also during a predetermined period of time after making a determination that said other device has ceased to be a member of the access sharing network. Also a device (101) configured to carry out the method.

主权项

1. A method of controlled access to content among a set of devices actively communicating with each other over an access sharing network, comprising:
joining, via a sharing application, a first device of the set of devices to the access sharing network, wherein the first device participates in a session of the sharing application with a second device in one or more interactive channels on the access sharing network, wherein the one or more interactive channels consists of one of an instant messaging channel, a discussion forum, a message board and a multiplayer game; obtaining, at the first device, a content item from the access sharing network, wherein access to the content item (i) is restricted and (ii) requires a license that contains (ii)(a) access control data and (ii)(b) a decryption key to enable a requested operation that includes playback and recording operations of the content item at the first device, wherein (iii) the access control data (iii)(a) comprises one or more permissions that are granted with respect to the requested operation of the content item and (iii)(b) specifies an originating URL address of the content item assigned to at least one device of the set of devices of the access sharing network, and wherein the decryption key is necessary to decrypt the content item; obtaining, at the first device, the license that contains the access control data and decryption key from the second device; determining, at the first device, in response to (i) successfully evaluating the license that contains the access control data and the decryption key and (ii) verifying that the content item (ii)(a) is obtained from the originating URL address of the content item within the access sharing network to prevent sharing without authorization by an owner of the original of the content item and (ii)(b) is accessed from a right context of the requested operation to prevent a sharing of the content item embedded in a different context, that the first device is authorized to perform the requested operation of the content item; and granting access and enabling the requested operation of the content item at the first device in accordance with the access control data determined from the license by using the access control data and the decryption key only in response to (i) verification that the content item is (i)(a) obtained from the originating URL address of the content item and (i)(b) accessed from the right context, and (ii) a positive determination that the second device is still an actively participating member in the session of the sharing application of the access sharing network.