Samsung Electronics Co., Ltd.

Song Wei

Peng Ning

Xun Chen

Ahmed M Azab

Wenbo Shen

Michael C Grace

Bryan Eugene Rabeler

Jitesh Shah

A method for verifying data integrity of a block device is provided. The method includes providing a secure world execution environment configured to monitor changes to data blocks of a block device, within the secure world execution environment, generating a hash for changed data blocks of the block device, and within the secure world execution environment, verifying and generating a cryptographic signature.

Methods and apparatus to enable runtime checksum verification of block device images

A method and apparatus update an image stored in a memory of a device. A next block writing index n for updating a first target memory block of the memory is determined. Backup data is written to a backup block of the memory when n is an even number. The first target memory block is updated with the new data. The backup data is calculated based on a binary operation between new data corresponding to n and old data stored in a second target memory block corresponding to n+1, and the binary operation has reversibility. If n is the last block writing index, then the binary operation is not used and the backup data is the same as the new data.

Condensed FOTA backup

Growing community of inventors

Johns Creek, GA, United States of America

Song Wei