Method, device and system for secure distance measurement
US11156704B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 2016 |
| Grant date | Oct 26, 2021 |
| Priority date | — |
| Expiry date | Sep 12, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J13/0003
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Method for secure distance measurement comprising the following steps: transmitting from a verifier (V) to a prover (P) a challenge message comprising a challenge bit sequence (C); transmitting from the prover (P) to the verifier (V) a response message comprising the response bit sequence (R); verifying, in the verifier (V), the response message on the basis of the response bit sequence (R); and determining, in the verifier (V), the distance between the verifier (V) and the prover (P) on the basis of the time difference between the challenge message and the response message. The challenge message and/or the response message are transmitted by a transmission protocol in which the bit sequence (C, R) of the corresponding message is transmitted by a transformed spreading code chip sequence (TCSCS, TRSCS), wherein the transformed spreading code chip sequence (TCSCS, TRSCS) is obtained by transforming a spreading code chip sequence (CSCS, RSCS) of the bit sequence (C, R) on the basis of a transform function (ftrans).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.