Authentication system and device including physical unclonable function and threshold cryptography
US10931467B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 2019 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Feb 19, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3221
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A device comprising: a physical unclonable function (PUF) device configured to generate an output value based on hardware characteristics of the PUF device; and a processor connected to the PUF device, the processor configured to: execute a cryptographic operation in a sequence of ordered stages including a first stage and a second stage, the executing comprising: in the first stage: recovering a first secret value based on a first output value obtained from the PUF device; executing a first sub-operation using the first secret value; and removing unobscured values from memory prior to execution of a subsequent stage; in the second stage: recovering a second secret value based on a second output value obtained from the PUF device; and executing a second sub-operation using the second secret value to enable execution of a cryptographic operation encoded with at least the first secret value and the second secret value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.