Method for operating a portable data carrier, and such a portable data carrier
US9912471B2 · kind B2 · utility
0Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 16, 2013 |
| Grant date | Mar 6, 2018 |
| Priority date | — |
| Expiry date | Dec 22, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3242
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for operating a portable data carrier includes a processing unit for processing commands and a memory unit for storing data, with random wait states being inserted into the processing of the commands for thwarting SPA/DPA attacks. An actual checksum may be computed over the data of a selected region of the memory unit during a random wait state. A portable data carrier is arranged for executing the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.