Intertrust Technologies Corporation

Palo Alto Research Center Inc.

Vanishree Rao

Robert E Tarjan

Shantanu Rane

Ersin Uzun

Alejandro Enrique Brito

David P Maher

Jarl A Nilsson

Vincent Bindschaedler

Stephen G Mitchell

Warren Bruce Jackson

Eugene Michael Chow

This disclosure relates to systems and methods for managing protected electronic content using proxy reencryption techniques. Rights management architectures are described that may, among other things, provide end-to-end protection of content keys from their point of origination at a content creator and/or content service to end user devices. Proxy reencryption techniques consistent with aspects of the disclosed embodiments may enable transformation of a ciphertext under one public key to a ciphertext containing the same plaintext under another public key. Consistent with embodiments disclosed herein, proxy reencryption processes may be implemented using indistinguishability obfuscation and puncturable public-key encryption schemes, functional encryption, and/or white box obfuscation techniques.

Content management systems and methods using proxy reencryption

This disclosure relates to systems and methods for managing protected electronic content that employ relatively efficient messaging schemes. Rights management architectures are described that may, among other things, provide end-to-end protection of content keys from their point of origination at a content creator and/or content service to end user devices. Certain embodiments may further provide for message protocols where fewer messages are sent in connection with a protected content license request process, thereby reducing latency associated with license request and provisioning processes.

Digital rights management systems and methods using efficient messaging architectures

This disclosure relates to systems and methods for performing cryptographic operations in connection with the management of electronic content using multiple license services. In some circumstances, a content service may not wish to share unencrypted content keys with a single license service for a variety of security reasons. Embodiments of the disclosed systems and methods may use multi-party cryptographic methods in connection with the management of protected content keys and/or associated licenses and/or the distribution of content keys and/or licenses to authorized users and/or devices. In various embodiments, a content service may split a content key into a plurality of key shares and may transmit the key shares to a plurality of different license services. The license services may coordinate operations to generate a protected content key without revealing unencrypted content key to any of the participating license services.

Multi-party cryptographic systems and methods

This disclosure relates to systems and methods for managing protected electronic content that employ relatively efficient messaging schemes. Rights management architectures that provide end-to-end protection of content keys from their point of origination at a content creator and/or content service to end user devices. Certain embodiments further provide for message protocols where fewer messages are sent in connection with a protected content license request process, thereby reducing latency associated with license request and provisioning processes.

Digital rights management systems and methods using efficient messaging schemes

A secured system includes at least one semiconductor chip comprising information processing circuitry. An array of contact pads is disposed on a surface of the chip and is electrically coupled to the information processing circuitry. The secured system includes one or more semiconductor chiplets. Each chiplet comprises at least a portion of at least one hardware trusted platform module that cryptographically secures the information processing circuitry. An array of electrically conductive microsprings is disposed on a surface of the chiplet and is electrically coupled between the hardware trusted platform module and the contact pads.

Microspring structure for hardware trusted platform module

A method is provided for generating an encrypted database. The method includes: receiving a plaintext database having plaintext data entries therein; and generating an encrypted database using the plaintext database, the encrypted database including encrypted data entries therein. The encrypted database is configured to support at least one form of conditional query such that the at least one form of conditional query returns a correct encrypted result when the query is computed on the encrypted data entries without the decryption thereof.

System and architecture for analytics on encrypted databases

A method is provided for generating an encrypted database. The method includes: receiving a plaintext database having plaintext data entries in one or more columns; augmenting the received plaintext database to generate an augmented plaintext database, the augmenting including the addition of one or more columns to the received plaintext database, each added column corresponding to an attribute which is to be made available for conditional queries; and encrypting the augmented plaintext database to generate the encrypted database including encrypted data entries. The encrypted database supports at least one form of conditional query for those attributes corresponding to the added columns, the at least one form of conditional query being computed on the encrypted data entries without the decryption thereof to produce an encrypted result.

System and architecture for supporting analytics on encrypted databases

A computer-implemented method for protecting sensitive data via data re-encryption is provided. Encrypted data is maintained. A data query is received from a user associated with a public key and a secret key. Results of the query are computed by identifying at least a portion of the encrypted data and by adding plaintext for the identified portion of the encrypted data as the results. A re-encryption key is generated for the results using the public key of the user and the results are re-encrypted using the re-encryption key. The re-encrypted results are then transmitted to the user.

Computer-implemented system and method for protecting sensitive data via data re-encryption

One embodiment provides a system for noise addition to enforce data privacy protection in a star network. In operation, participants may add a noise component to a dataset. An aggregator may receive the noise components from the plurality of participants, compute an overall noise term based on the received noise components, and aggregate values using the noise components and overall noise term.

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San Mateo, CA, United States of America

Vanishree Rao