System, apparatus and method for safety state management of internet things (IoT) devices
US9985946B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2015 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Jun 1, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a device includes: at least one processor; at least one sensor to sense an environmental condition; and a storage to store instructions that, when executed by the at least one processor, enable the device to: receive an encrypted nonce from a safety controller; decrypt the encrypted nonce using a value obtained from an entropy multiplexing seed tree generated by the device based at least in part on an initialization seed value received from the safety controller; responsive to decryption of the nonce, update a portion of a shared memory associated with the device to identify a safety state of the device; and encrypt a second nonce using the value obtained from the entropy multiplexing seed tree and send the encrypted second nonce to the safety controller. Other embodiments are described and claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.