Secure inductively-coupled communications systems
US8909141B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2012 |
| Grant date | Dec 9, 2014 |
| Priority date | — |
| Expiry date | Jan 18, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04K2203/34
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Security in inductively coupled communications systems, such as near field communications (NFC), may be improved by restricting signals carrying user data to an authorized data transmission region. Security may be particularly important when the NFC carries financial transaction information or authorization credentials. Scramble signals may be transmitted along with data signals carrying the user data and designed to overshadow the data signals outside of the authorized data transmission region. The scramble signal transceiver may be designed to have a slower decay rate with distance from the transceiver than the data signal. By adjusting the power levels of the scramble signal and the data signal, the authorized data transmission region may be adjusted. Scramble signals may not be required if the data signal strength outside the authorized data transmission region is below the minimum threshold value required by eavesdropping receivers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.