Secured master-mediated transactions between slave devices using bus monitoring
US10783250B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2019 |
| Grant date | Sep 22, 2020 |
| Priority date | — |
| Expiry date | Apr 7, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/034
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A secured device includes an interface and a processor. The interface is configured to connect to a bus, to which a host and a second device are coupled. At least the second device operates over the bus in a slave mode, and the host operates on the bus as a bus master that initiates transactions on the bus, at least on behalf of the secured device. The processor is configured to request the host to initiate, for the secured device, a transaction that accesses the second device over the bus, to monitor one or more signals on the bus, at least within a period during which the host accesses the second device over the bus in performing the requested transaction, and to identify, based on the monitored signals, whether a security violation occurred in performing the requested transaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.