Response-based cryptography using physical unclonable functions
US11477039B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2019 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Mar 9, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods of authentication and encrypted communication between a server and client devices using independently-generated shared encryptions keys are disclosed. Client devices with arrays of physical-unclonable-function devices are respond to challenges from a server. Characteristics of the arrays are stored by the server during a secure enrollment process. Subsequently, the server issues challenges to the clients. The clients derive encryption keys from their responses to those challenges generated by the clients from characteristics of portions of the arrays specified by the challenges. The clients send messages encrypted with the client-generated encryption keys to the server. The server uses the stored characteristics to independently reproduce the client-generated encryption key. When the server-generated encryption key matches the client-generated key, the clients may be authenticated and the clients can communicate securely with the server without exchanging encryption keys. Ternary PUF characterization schemes may be used to achieve acceptable authentication error rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.