New pending patent applications are published on Thursdays. Today's Spotlight Patents concern digital fingerprinting. Assigned to Dell, the first application discloses techniques for using content-based encryption keys. Assigned to TiVo, the second application discloses techniques for deriving fingerprints for media content that is being watched by a user.
20160352511, "Content-based encryption keys," assigned to Dell.
Techniques and mechanisms described herein facilitate the encryption of content using content-based encryption keys. According to various embodiments, data stream may include one or more data chunks. A client machine may apply a hash function to a data chunk to determine a fingerprint value. A cryptographic protocol shared with a remote server may be applied to the fingerprint value to determine a data chunk encryption key. The data chunk encryption key may be used to encrypt the data chunk, and the encrypted data chunk may be sent to the remote server for storage.
20160353181, "Media content fingerprinting system," assigned to TiVo.
A method of deriving fingerprints for media content that is being watched by a user is described. For example, a user may select a particular show on an electronic programming guide displayed by a media device. The media device may then request the content stream, from the content source, that includes the particular show. The source may indicate whether a fingerprint is needed for the particular show requested by the media device. The indication may be a flag in the data received by the media device. If the particular show needs to be fingerprinted as indicated by the flag, the media device may decompress the corresponding video frames, load the decompressed video frames into memory and analyze the video frames to derive a fingerprint from the video frames.