Microsoft Technology Licensing, LLC

Robert Groza, Jr

Yevgeny Yankilevich

Yi Yuan

Hari Angepat

Narayanan Ravichandran

Vadim Makhervaks

Oren Ish-am

Aaron Michael Landy

Ezzeldin Hamed

Ahmed Abdelsalam

Hari Daas Angepat

A computing system uses Advanced Encryption Standard XEX Based Tweaked Codebook Mode with Ciphertext Stealing (AES-XTS) encryption to encrypt a block of data using a tweak key, a data key, a modified tweak value, and the block of data to thereby generate an encrypted block of data. The modified tweak value is computed according to the expression DEC(0, CONST KEY), where DEC is an AES decryption algorithm, and CONST KEY is the tweak key. The encrypted block of data is thereby formatted according to the Advanced Encryption Standard with no extended mode and not according to the XEX Based Tweaked Codebook Mode with Ciphertext Stealing.

Encryption system and method

The present disclosure relates to utilizing a buffer management system to efficiently manage and deallocate memory buffers utilized by multiple processing roles on computer hardware devices. For example, the buffer management system utilizes distributed decentralized memory buffer monitoring in connection with augmented buffer pointers to deallocate memory buffers accurately and efficiently. In this manner, the buffer management system provides an efficient approach for multiple processing roles to consume source data stored in a memory buffer and to deallocate the buffer only after all roles have finished using it.

Memory buffer management on hardware devices utilizing distributed decentralized memory buffer monitoring

A computer implemented method includes receiving a first request at a cache for first data and checking the cache for the first data. In response to the first data residing in the cache, the first data is provided from the cache. In response to the first data not residing in the cache, a first memory request is sent to memory for the first data, a first request pending bit to is set indicate the first request is pending, and the cache proceeds to process a next request for second data.

Cache data provided based on data availability

A computing system uses AES-XTS encryption to encrypt data of a first part of first data stream using a tweak key, a data key, an initial tweak value, in a first encryption session, store the encrypted first part, then encrypts a second part of the first data stream in a second encryption session commenced after the termination of the first encryption session; and store the encrypted second part in the encrypted data store. The second part of the first data stream is encrypted using a modified tweak value computed based on the initial tweak value, the tweak key, and a block index of a last cipher block of the first part of the first data stream.

System and method for incremental encryption

Methods, systems, and computer storage media for providing a Shell PCIe Bridge (SPB) and shared-link-interface services that support a shared common PCIe physical link between SPB clients in a PCIe system. In operation, shared-link-interface operations include accessing, at a Shell PCIe Bridge (SPB), an outbound transaction for a PCIe endpoint vendor IP or an inbound transaction for an SPB client. The SPB supports a shared common PCIe physical link based on a shared-link-interface comprising vendor-agnostic downstream custom interface and a vendor-specific upstream PCIe endpoint interface. The shared-link-interface operations further include processing the outbound transaction or the inbound transaction based on shared-link-interface services. In this way, processing transaction comprises executing shared-link-interface operations that provide protection enhancements associated with sharing a physical PCIe link. The shared-link-interface operations further include communicating the outbound transaction to the PCIe endpoint vendor IP or the inbound transaction to the SPB client.

Growing community of inventors

Redmond, WA, United States of America

Robert Groza, Jr