Reducing amount of helper data in silicon physical unclonable functions via lossy compression without production-time error characterization
US11522725B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2018 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Apr 30, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/34
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method, system and computer program product for reducing the amount of helper data that needs to be stored using two innovative techniques. The first technique uses bit-error-rate (BER)-aware lossy compression. By treating a fraction of reliable bits as unreliable, it effectively reduces the size of the reliability mask. With the view of practical costs of production-time error characterization, the second technique enables economically feasible across-temperature per-bit BER evaluation for use in a number of fuzzy extractor optimizations based on bit-selection to reduce overall BER (with or without subsequent compression) using room-temperature only production-time characterization. The technique is based on stochastic concentration theory and allows efficiently forming confidence intervals for average across-temperature BER of a selected set of bits. By using these techniques, it is economically feasible to achieve a dramatic reduction in the amount of helper data that needs to be stored in non-volatile memory and/or one-time-programmable memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.