Google Inc.

Jason Douglas Waddle

Marius P Schilder

J Alex Halderman

Wai Fun (Aaron) Lee

Matt Harren

Krasimir Mitkov Dobrev

A number of unique identifiers is determined by, at a device, receiving a request to determine the number of unique identifiers, outputting a response to the request, and receiving data representing the number of the unique identifiers based on the response to the request. The data representing the number of the unique identifiers is free of information indicative of an identity of a source of the unique identifiers.

Counting unique identifiers securely

Systems and methods provide for controlling download and playback of media content. A system includes a client, which can play content, and a server. The server includes a permission system that can determine whether a client request to download or play content should be granted. All purchase, download, and playback requests require permission from the permission system. The server also includes a DD module system that transfers a DD module to the client. The DD module includes a content key decryption module, a content decryption module, and a content decompression module. The content key decryption module decrypts an encrypted content key that was received from the server. The decryption uses a unique DD module key that has been hard-coded into the content key decryption module. The content decryption module uses the content key to decrypt encrypted content. The content decompression module decompresses compressed content so that it can be played.

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Oakland, CA, United States of America

Jason Douglas Waddle