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US 11,443,016 B2Granted
Pre-key with authentication using logical combinations of pre-key bits with other information
AssigneeSony Corporation
InventorBrant Candelore
Life of this patent
Estimating the term…
Abstract
A pre-key is combined with non-pre key data to render a content key useful for decrypting content, such as audio-video content. This other, non-pre key data may be anything that, for example, an ATSC 3.0 source such as a Broadcaster would like to authenticate into the content. For example, the data that is XOR'd with pre-key information may include various fields such as the Broadcaster designated market area (DMA), a copyright notice, the identification of the content to be decrypted, the user's group ID (subscriber group), etc.
Claims20
An apparatus, comprising:
- at least one computer storage that is not a transitory signal and that comprises instructions executable by at least one processor to:
- receive a first pre-key;
- and
- combine, using a logical operation, the first pre-key with information that is not part of the first pre-key from a broadcaster to render a first key for decrypting content;
- decrypt content using the first key, wherein the information that is not part of the first pre-key comprises at least a Broadcaster designated market area (DMA) and a copyright notice.
2 more elements
A method comprising:
- receiving a first key;
- combining the first key with information that is not part of the first key to form a content key;
- and
- decrypting received content according to the content key, wherein the information that is not part of the first pre-key comprises at least a Broadcaster designated market area (DMA) and a copyright notice.
1 more element
An assembly, comprising:
- at least one computer storage that is not a transitory signal and that comprises instructions executable by at least one processor to:
- transmit a first pre-key;
- transmit information from a broadcaster that is not part of the first pre-key that a receiver is to use to render a first key for decrypting content, the information that is not part of the first pre-key comprising at least two of a Broadcaster designated market area (DMA), a copyright notice, an identification of content to be decrypted, a user's group ID.
Dependencies are inferred from the claim text.