Distributed one-time-use entry code generation for physical access control method of operation and mobile systems
US11777996B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2019 |
| Grant date | Oct 3, 2023 |
| Priority date | — |
| Expiry date | Jul 2, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/61
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A physical access control system enables acceptable portal entry codes upon receiving each physical access request by operating on the elapsed time from a previous physical access request to generate a temporal credential. The controller receives a plurality of physical access requests from a plurality of mobile application devices. Upon authenticating the first access request, the controller eliminates repetition from the space of acceptable successor requests from each mobile application device. Monotonic nonces advance the range of temporal code matches. Entry code generation is decentralized to distributed application devices and is inherently unknowable until a successor access request is initiated by the same application device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.