Cryptography Research, Inc.

Joel Patrick Wittenauer

Steven Cameron Woo

Benjamin Che-Ming Jun

Matthew Evan Orzen

Scott C Best

Paul Carl Kocher

Pankaj Rohatgi

Michael Alexander Hamburg

Bryan Jason Wang

Denis Alexandrovich Pochuev

Winthrop Wu

Amit Kapoor

Samatha Gummalla

Qinglai Xiao

Ashish Raj

A computing system includes a host device and a root of trust (RoT) device for performing batch encryption and decryption operations facilitated by a direct memory access (DMA) engine. The host device generates a command table for batch processing of a set of address tables that each describe a set of data blocks of a file to be encrypted or decrypted. The DMA engine facilitates a DMA transfer of the command table from the host memory to an RoT memory of the RoT device. The RoT device then performs batch processing of the address tables referenced in the command table. For each address table, the DMA engine copies a set of data blocks from the host memory to the RoT memory, a cryptographic engine encrypts or decrypts the data blocks, and the DMA engine copies the transformed data blocks back to the host memory.

Batch transfer of commands and data in a secure computer system

The embodiments described herein describe technologies to address initial establishment of device credentials in an Internet of Things (IoT) infrastructure. The embodiments are directed to unifying secure credential establishment regardless of the endpoint type, thus addressing the challenge of a great diversity among IoT devices. This approach is designed to address a challenge of initial trusted enrollment of the IoT endpoints into a secure infrastructure, which allows secure communications between the devices in the IoT environment.

Internet of things (IoT) device management

Pairing data associated with a second device may be received at a first device. The pairing data may be received from a server. A first authentication proof may be generated based on the pairing data received from the server. A second authentication proof may be received from the second device. Furthermore, an authentication status of the second device may be updated based on a comparison of the first authentication proof that is based on the pairing data received from the server and the second authentication proof that is received from the second device.

Authentication of a device

A table key capable of decrypting a first table from a plurality of encrypted tables may be received. Each of the encrypted tables may include at least one pair of values corresponding to a challenge value and a response value. A request to authenticate a secondary device may be received and in response to the request to authenticate the secondary device, a challenge value obtained by using the table key to decrypt an entry in the first table may be transmitted to the secondary device. A second challenge value may be transmitted to the secondary device and a cryptographic proof may be received from the secondary device. The validity of the cryptographic proof received from the secondary device may be authenticated based on the second challenge value and the response value obtained by using the table key to decrypt the entry in the first table.

Authenticating a secondary device based on encrypted tables

Growing community of inventors

Pleasanton, CA, United States of America

Joel Patrick Wittenauer