Transponder system for transmitting key-encrypted information and associated keys
US9830481B2 · kind B2 · utility
0Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2006 |
| Grant date | Nov 28, 2017 |
| Priority date | — |
| Expiry date | Jul 21, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A transponder (1) comprises at least one memory (MEM1, MEM2) for storing encrypted information (E_k(EPC, PI)) that has been encrypted by use of a key (k) and for storing the key (k) associated with the encrypted information (E_k(EPC, PI)). The transponder (1) is adapted to send the key (k) slower response than the encrypted information (E_k(EPC, PI)) in response to queries of a reading device (2), which is preferably done by delaying the transmission of the key (k) or by limiting the response rate at which the key (k) is transmitted. In particular the invention is related to RFID systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.