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US 12,216,919 B2Granted
External memory data integrity validation
AssigneeTexas Instruments Incorporated
InventorsBarak Cherches, Uri Weinrib
Life of this patent
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Abstract
In some examples, a method includes determining, during a boot sequence of a controller, a hash value for data of a block of a flash storage device, the block including executable code, determining a bit pattern based on a randomly generated number, extracting a subset of data bits of the hash value according to the bit pattern to obtain a snippet, and storing the snippet to a secure storage device.
Claims30
A device comprising:
- a first storage;
- and
- a processing circuit configured to:
- determine, during a boot or startup sequence of a controller, a first authentication value for a first block of a second storage, the first block of the second storage including executable code;
- store a first snippet in the first storage, the first snippet being based on the first authentication value;
- determine, at run-time of the controller, data integrity of the first block, wherein determining the data integrity of the first block comprises:
- determining a second authentication value of the first block, and
- comparing a second snippet with the first snippet to generate a comparison result, the second snippet being based on the second authentication value,
- responsive to the comparison result indicating the first and second snippets do not match, halt or prevent the executable code from running in the controller, or prevent the controller from receiving the executable code, or provide a fault signal;
- and
- responsive to the comparison result indicating the first and second snippets match, allow the controller to execute the executable code.
8 more elements
Dependencies are inferred from the claim text.