Countersigning updates for multi-chip devices
US10303884B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 2017 |
| Grant date | May 28, 2019 |
| Priority date | — |
| Expiry date | Nov 15, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/0823
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A device facilitating countersigning updates for multi-chip devices includes at least one processor configured to receive, from a collocated chip, a data item and a software update, the data item being signed using a private key corresponding to a primary entity associated with the collocated chip and the data item comprising an authentication code generated using a symmetric key corresponding to a secondary entity associated with the software update. At least one processor is further configured to verify the data item using a public key associated with the primary entity. At least one processor is further configured to verify the software update based at least in part on the authentication code and using the symmetric key corresponding to the primary entity. At least one processor is further configured to install the software update when both the data item and the software update are verified, otherwise discard the software update.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.