Google Inc.

Widevine Technologies, Inc.

Duncan MacLean

Thomas Inskip

Francis William Galligan

Brian Andrew Baker

Edward Charles Hiar

Amanda Elwell Walker

Neal Taylor

Thomas William Inskip, Vi

Brad Kollmyer

Eric Bradley Shapiro

Aric Kollmyer

Mike Rutman

Dan Robertson

Dick Hunsche

Rahul Ricardo Frias

Brian Baker

Eric Shapiro

A system and method for decrypting encrypted media that have changing initialization vectors and keys is disclosed. As encrypted media is received and played back, the encrypted frames can be monitored (e.g., checked) to detect whether or not initialization vectors are prepended to them. If a prepended initialization vector is detected, the prepended initialization vector is used to facilitate the decryption of the encrypted frame. If no prepended initialization vector is detected, a new initialization vector is generated by using a last portion of bytes of the preceding encrypted frame and the new initialization vector is used to facilitate the decryption of the encrypted frame. A signal byte can be included to signal whether the frame is encrypted or not, whether an initialization vector is included, and other information about the encrypted frame.

System and methodology for decrypting encrypted media

A method, apparatus, and manufacture for debugging and crash logging is provided. A log file is received, where the log file includes encrypted log messages that indicate execution trace of obfuscated code while leaving code locations of corresponding code in the obfuscated code unknown. The encrypted log messages include execution way-point indices. Next, at least a portion of the log file is then decrypted. A debug log viewer is then employed to view the decrypted log file. The debug log viewer includes an execution way-point manifest that correlates each of the execution way-point indices to a corresponding code location.

Method, manufacture, and apparatus for secure debug and crash logging of obfuscated libraries

The invention provides secure playback on a client of a selected version of content with files downloaded from a corresponding package stored on a content server. The package includes a plurality of video and audio files for the available versions of the content. Each package of files includes a master manifest that lists the files included in the package. Also, each file listed in the master manifest includes a separate hash value. Separate packages include other video and audio files and other master manifests for available versions of other/different content. In at least one embodiment, one or more subset manifests are generated from the master manifest. Each subset manifest lists a portion of the files listed in the master manifest and the corresponding hash values for these files.

Content subset conditional access framework

Methods and devices for controlling trick-play video streaming. Upon receipt of a request to play video at a fast-play (e.g., fast-forward or fast-reverse) speed that is some multiple of a normal playback speed, one of multiple possible frame-rate versions of a trick-play track may be selected based on the requested fast-play speed and an available network bandwidth, and a server may stream the selected frame-rate version of the trick-play track to a client for playout. The various frame-rate versions may differ from each other in terms of a rate at which they skip I-frames of the video.

Adaptive trick play streaming

A method and corresponding apparatus for controlling streaming of media content from a server to a client. A computing device predicts the bit rate of an upcoming portion of the media content for each of a plurality of variable bit-rate versions of the media content, and uses the predicted bit rates, as well as a measure of network bandwidth, as a basis to select one of the variable bit-rate versions to be streamed to the client. By repeating this prediction and selection function on a sliding window basis over the course of the media content, the selection of variable bit-rate version can dynamically change, to help accommodate variations in bit rate throughout the media content as well as variations in network bandwidth.

Predictive adaptive media streaming

An apparatus and method for selectively encrypting portions of data sent over a network between a server and a client. The apparatus includes parsing means for separating a first portion of the data from a second portion of the data, encrypting means for encrypting only of the first portion of the data, and combining means for combining the encrypted first portion of the data with the second portion of the data, wherein the second portion of the data is not encrypted. The apparatus further includes decrypting means installed at the client for decrypting the encrypted portion of the data. The apparatus is platform independent in terms of media format and data protocol. The encryption unit encrypts data transparently to the client based on the media format. The apparatus of the invention is implemented as one of an application and a plug-in object. The method for selectively encrypting portions of data which differ from each other in at least on characteristic sent over a network between a server and a client includes parsing the data into a first and second portion, encrypting only the first portion of the data, and sending the encrypted first portion and the second portion of the data over the network to the client. The method further includes receiving data from the server, determining whether a data stream is established between the server and the client, and negotiating an encryption key with a decryption shim of the client.

Apparatus, system and method for selectively encrypting different portions of data sent over a network

Growing community of inventors

Kirkland, WA, United States of America

Duncan MacLean