Arm Limited

Arm IP Limited

Dominic Phillip Mulligan

Gustavo Federico Petri

Derek Del Miller

Guilhem Floréal Bryant

Thomas Christopher Grocutt

Milosch Meriac

Yasuo Ishii

Hugo John Martin Vincent

Frederic Claude Marie Piry

Peter Richard Greenhalgh

Ian Michael Caulfield

Brendan James Moran

Albin Pierrick Tonnerre

Alastair David Reid

Matthias Lothar Boettcher

Nathan Yong Seng Chong

Shale Xiong

Anthony Charles Joseph Fox

Nathan Young Seng Chong

Aspects of the present disclosure relate to an apparatus comprising TEE circuitry configured to maintain a list of trusted devices, and interface circuitry to provide communication between the TEE of the apparatus and TEE circuitry of a device communicatively coupled to the apparatus. The TEE circuitry of the apparatus is configured to perform, with the TEE circuitry of the device, a remote attestation in respect of the TEE circuitry of the device. Responsive to a positive outcome of the remote attestation, the device is added to the list of trusted devices. The TEE of the apparatus receives, from the TEE circuitry of the device, an indication of one or more further devices which are trusted by the device, and adds said one or more further devices to the list of trusted devices.

Methods and apparatus for managing trusted devices

A data processing system is provided, which comprises receiving circuitry for receiving, from a requester, a request to use decrypted data obtained by decrypting encrypted data. Trusted execution circuitry provides a trusted execution environment. The trusted execution circuitry is configured to: securely store a policy, acquire a key within the trusted execution environment, where the key is associated with the decrypted or encrypted data, and respond to the request based on the policy and one or more characteristics of the requester.

Data security

Briefly, example methods, apparatuses, and/or articles of manufacture are disclosed that may be implemented, in whole or in part, using one or more processing devices to facilitate and/or support participation in computing activities by multiple parties having limited mutual trust. In one embodiment, computation may occur in a secure processing environment (SPE) while one or more untrusted parties reside outside of the SPE.

System, devices and/or processes for secure computation on a virtual machine

Aspects of the present disclosure relate to an apparatus comprising first interface circuitry to communicate with a first computing device and second interface circuitry to communicate with a second computing device. The first interface circuitry is configured to receive a handshake message from the first computing device. The second interface circuitry is configured to transmit the handshake message to the second computing device and to receive a handshake response message from the second computing device. The first interface circuitry is configured to transmit the handshake response message to the first computing device, whereby to establish a communication session between the first computing device and the second computing device. Apparatus comprises trusted execution environment circuitry to determine a cryptographic session key associated with said communication session, and use said session key to decrypt content of messages transmitted between the first and second computing devices via the apparatus, and analyse said decrypted content.

Methods and apparatus for encrypted communication

A data processing apparatus comprises branch prediction circuitry adapted to store at least one branch prediction state entry in relation to a stream of instructions, input circuitry to receive at least one input to generate a new branch prediction state entry, wherein the at least one input comprises a plurality of bits; and coding circuitry adapted to perform an encoding operation to encode at least some of the plurality of bits based on a value associated with a current execution environment in which the stream of instructions is being executed. This guards against potential attacks which exploit the ability for branch prediction entries trained by one execution environment to be used by another execution environment as a basis for branch predictions.

Encoding of input to storage circuitry

Growing community of inventors

St. Neots, United Kingdom

Dominic Phillip Mulligan