Comcast Cable Communications, LLC

Nikola Kolev

Kyong Park

John D Robinson

Jason S Burgess

Bradley Hess

Systems, apparatuses, and methods are described for converting digital rights management (DRM) data in a specific protocol to standardized DRM data. The standardized DRM data may be used to secure content delivered to user devices through a content delivery network. If a user device decides to record a content item, a request for authenticating entitlement to the content item may be sent to a network device and the network device may reply with an authentication receipt if appropriate. If the user device later decides to access the content item, the user device may send the authentication receipt back to the network server so that the network server may reply with a decryption key for decrypting the content item.

Digital rights management data conversion in a content delivery network

Disclosed are systems and methods for a digital rights management (DRM) interface. A DRM request can be received via a scheme-agnostic application program interface (API). A scheme-specific request based on the DRM request can be transmitted via a scheme-specific API. A response to the scheme-specific request can be received via the scheme-specific API. A response to the DRM request can be transmitted via the scheme-agnostic API.

Digital rights management interface

Disclosed are systems and methods for encryption key management. Content items, or portions thereof, can be assigned to a plurality of partitions. Each of the plurality of partitions can correspond to a timeframe of encryption key rotation. Cache control can be applied to manifests and/or content based on the timeframe of encryption key rotation.

Managing encryption keys for content

Methods, apparatuses, and systems are described for deriving secured keys and authenticating based on the derived keys. An entity may receive one or more derived keys and one or more key derivation algorithms associated with the one or more derived keys. A user device may derive, based on a key associated with the user device and unknown to the entity, a user key. The entity may derive, based on a first derived key and one of the key derivation algorithms, a second derived key, and may verify, based on the second derived key, the user key.

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Devon, PA, United States of America

Nikola Kolev