Patent ID: 9137214
Filing Date: 2015-09-15
Classification: H04L

Abstract:
1. On a content consumption device associated with a first audience of a plurality of possible audiences, a method of consuming blackout streaming of encrypted content, the method comprising: requesting a content license, wherein a request includes a client certificate with a public key of an asymmetric keypair; receiving the content license comprising a first subset of a plurality of candidate blackout decryption keys cryptographically tied to the public key, each candidate blackout decryption key corresponding to a specific audience of the plurality of possible audiences, the first subset excluding the candidate blackout decryption key corresponding to the first audience; receiving an encrypted content stream that is cryptographically encrypted from a content stream with a dynamically updatable content key, the encrypted content stream embedded with a leaf license comprising an encrypted content key that is cryptographically encrypted from the dynamically updatable content key with one or more blackout encryption keys; obtaining via a private key of the asymmetric keypair the one or more candidate blackout decryption keys from the first subset; and if the one or more blackout encryption keys do not include a blackout encryption key associated with the first audience, then: