Secure digital signatures using physical unclonable function devices with reduced error rates
US11271759B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 2019 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | Feb 12, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods for securing blockchain and other cryptographically signed ledgers 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 and receives responses generated by the clients from characteristics of portions of the arrays specified by the challenges. The challenge responses are used to authenticate the clients and are also used as cryptographic private keys for signing transaction blocks. Public keys corresponding to the private keys are generated allowing signed transaction blocks to be validated as well as allowing clients originating the transactions to be authenticated by other clients. Ternary PUF characterization schemes are used to achieve acceptable authentication error rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.