Microsoft Technology Licensing, LLC

Other

Gideon Andreas Yuval

Nathan P Myhrvold

Josh D Benaloh

Yacov Yacobi

John R Douceur

Atul Adya

Joseph M Joy

Yuqun Chen

Sunita Shrivastava

Steven J Friedman

Karen A Hargrove

Paul England

Michael Jack Sinclair

Michael Dean Stokes

Nicholas P Wilt

Andrew D Rosen

William E Kim

Darko Kirovski

Ramarathnam R Venkatesan

Andrew James Edwards

Ronnie Chaiken

Hoi Huu Vo

David Mitford Gillies

Keith R Vogel

Richard M Shupak

Hon Keat W Chan

Amitabh Srivastava

Ken B Pierce

Robert I Davidson

Norman Eugene Apperson

John A Lefor

Gillian Furse

Gregory A Eigsti

Bruce M Kuramoto

Kenneth Paul Hinckley

Mariusz Hieronim Jakubowski

Gerald Cermak

James Frederick Blinn

Matthew C Cary

Davide Massarenti

R Donald Thompson, Iii

Cosmin A Corbea

Michael L Ernst

Tom Blank

Dror Avnon

Zvi Greenfeld

Yair Baydach

Optimizations are provided for completing a transaction event using authentication information. In particular, a presence of a transaction processing device is initially detected. Then, transaction information is received from the transaction processing device. The transaction information corresponds to a current transaction event. After receiving the information, a communication link is established with an on-body device. This device includes authentication information that is necessary to complete the current transaction event. The authentication information is then received from the on-body device. This information has a time-limited use availability. Finally, the received authentication information is used to complete the current transaction event.

Mobile device security using wearable security tokens

The claimed subject matter provides systems and/or methods that effectuates and establishes mobile device security. The system can include devices that detect point of sale mechanisms or secure token devices and based at least in part on the detection of secure token devices the system effectuates release of electronic funds persisted on a mobile device in order to satisfy a debt accrued at the point of sale mechanism.

Techniques are disclosed to enable utilization of randomly-occurring features of a label (whether embedded or naturally inherent) to provide counterfeit-resistant and/or tamper-resistant labels. More specifically, labels including randomly-occurring features are scanned to determine the labels' features. The information from the scan is utilized to provide identifying indicia which uniquely identifies each label and may be later verified against the label features that are present to determine whether the label is genuine. In a described implementation, the identifying indicia may be cryptographically signed.

Counterfeit and tamper resistant labels with randomly occurring features

Serialized data from broadcast services is provided to a broadcast server for transmitting to one or more client devices. The serialized data may correspond to shared data, private data, or control data. Data is scheduled for transmission based on weighted priorities including quality of service metrics. The transmission frame is arranged according to a frame protocol that includes provisions for a table of contents indexing system for the shared data. Packets of shared data are formatted based on criteria that is known by the particular broadcast service and corresponding application that is resident on the client device. The client device receives the table of contents at the transport layer, and notifies applications of data that will be available in the next frame. Applications submit prioritized requests to the transport layer, requesting data in the next frame. Data is retrieved by the transport layer, and deserialized by handlers for each application.

Frame protocol and scheduling system

An exclusive encryption system is established using multiple computing devices. The exclusive encryption system allows for the exclusion of certain plaintext (e.g., by one of the computing devices) and ciphertext (e.g., by another of the computing devices) while at the same time maintaining the privacy created by the encryption (e.g., so the other computing device cannot see the plaintext). The exclusive encryption system may be implemented as part of a serverless distributed file system with directory entries (e.g., file names or folder names) being the plaintext, or alternatively as part of other systems.

Exclusive encryption

A computer-implemented system and method for configuring and operating a white-box cipher is disclosed. In one implementation, the system employs a method for configuring pseudorandom data derived from a key to perform key-scheduling functionality associated with rounds of the cipher. Additionally, the system employs a method for generating white-box executable code, wherein the code hides the pseudorandom data by incorporating it into mathematical operations performed during execution of the rounds. Accordingly, the cipher is suited for white-box applications managing digital rights, such as decoding audio, video and other content.

Semi-public white-box cipher

A secure communication channel between first and second radio frequency communication devices is indicated by the synchronized indicators on each of the two devices. The indicator may be a light or speaker. After a secure channel is established, the indicators may be simultaneously operated so that a user may definitively and positively determine that the two devices are securely connected to each other. Any interloper devices would not be indicating on the same pattern and thereby be identified.

Synchronized indicator light for secure connections

Systems and methods are described herein for embedding and detecting a watermark in a digital content file, such as an audio file or a video file. If the watermark is detected in the digital content, a certificate associated with the digital content is located. The certificate contains copyright information that indicates permissible uses of the digital content file, e.g., the digital content file may be played one time, five times, any number of times during a specified time period, etc. If the watermark is not detected, the file is processed. In one implementation, a device configured to process the digital content file is also configured to locate a certificate associated with the digital content file before processing it. If the certificate is not found, the file is not played. If the certificate is found, the device only processes the file in accordance with instructions in the associated certificate.

Software anti-piracy systems and methods utilizing certificates with digital content

Methods and apparatus for protecting copyrighted information, e.g., video signals, from unauthorized use are described. Encrypted video signals are transmitted from a source device, e.g., display adapter, to a display device, e.g., monitor, over analog signal lines after the identity of the destination device is confirmed by receipt of a certificate assigned to the destination device. A session key, used for encrypting the analog signals, is generated and exchanged between the source and destination devices. The source and destination devices each include a pseudo-random number generator driven by the session key. As part of the encryption process a false video signal is generated. The false video signal and R, G, B video signals are transmitted to the display device over four lines. The lines used to transmit the R, G, B and false video signals are periodically swapped as a function of the output of the pseudo random number generator to encrypt, e.g., scramble, the video signals. To avoid having to provide an additional line between the display adapter and the display device beyond those used in conventional displays, horizontal synchronization information is combined with, e.g., modulated on, one or more of the other signals transmitted to the display. The horizontal sync line is then used to convey one of the four video signals. The display device extracts the horizontal timing information from the received video signals and decrypts the signals using the output of its pseudo random number generator to reverse the scrambling process used to encrypt the transmitted video signals.

Methods and apparatus for protecting signals transmitted between a source and destination device over multiple signals lines

Methods and systems are described that enable protection of digital content, such as movies and the like, by making pirated copies traceable back to a unique decryption key that was utilized to decrypt the originally encrypted content. The innovative advancements do not rely on post-distribution watermarking or fingerprinting techniques, and yet intrinsically link any unauthorized copies back to a unique cryptographic key or key collection that was used when the genuine copy was reproduced. In an example, when a content player decrypts its associated key collection and uses the key collection to decrypt the digital content, the version of the digital content that is decrypted points directly to the specific content-player that was authorized to decrypt it with that key collection.

Methods and systems of protecting digital content

Systems and/or methods are described that strengthen secure hash functions. These systems and/or methods may, in some embodiments, create a random-appearing element based on a message and using a process. The element may then be assembled with the message. This assembly may be hashed using a secure hash function. Using the same process and secure hash function, the message may later be authenticated.

Strengthening secure hash functions

Growing community of inventors

Mercer Island, WA, United States of America

Gideon Andreas Yuval