Remotely controlling devices using short message service
US11297176B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2020 |
| Grant date | Apr 5, 2022 |
| Priority date | — |
| Expiry date | Sep 17, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/0442
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A first device communicates with a remote second device by sending an SMS message that includes an encrypted first device phone number portion and a command, which may also be encrypted. The second device receives the SMS message and decrypts the encrypted first device phone number portion to verify the authenticity of the message by comparing it with a first device phone number included with the message by a cellular carrier. Successful decryption authenticates the first device, and the command is then executed, after being decrypted if it had been encrypted. Further authentication can optionally include decrypting an encrypted unique device identifier and/or phone number of the second device. The second device may also consider an embedded time stamp to determine whether the command is superseded by a subsequently issued command.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.