Service authorization for IoT devices operating locally
US10581872B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2017 |
| Grant date | Mar 3, 2020 |
| Priority date | — |
| Expiry date | Oct 25, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/63
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems, devices, and techniques for service authorization are described. A described device includes a transceiver to communicate with an authorization server, a memory to store a shared secret key established between the device and the authorization server, and a processor. The processor can set an authorization timer for a first time period based on obtaining an authorization from the authorization server, and activate device features for a duration of the first time period. The processor can receive from the authorization server an authorization message that includes an authorization key hash based on the shared secret key and a server timestamp, determine a local key hash based on the shared secret key and a local timestamp, set the authorization timer for a second time period based on the authorization key hash matching the local key hash, and maintain an activation of the features for a duration of the second time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.