Signature generation by a data processing device
US11461175B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2021 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | Sep 17, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/21
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Signature generation circuitry is configured to update a signature in response to each of a plurality of writes to memory. The signature is updated by performing bitwise operations between current bit values of the signature and at least some of the bits written to memory in response a write. The bitwise operation are order-independent such that the resulting signature is the same irrespective of the order in which the writes are used to update the signature. The signatures are formed in an order-independent manner such that, if no errors have occurred in generating the data to be written to be memory, the signatures will match. In this way, a compact signature is developed that is suitable export from the data processing device for checking against a corresponding data processing device of a machine running a duplicate application.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.