Generating a key for use as a shared secret
US10187204B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2015 |
| Grant date | Jan 22, 2019 |
| Priority date | — |
| Expiry date | Mar 4, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A communications device for generating a key for use as a shared secret in communications with another communications device is provided. Each of the communications devices comprises a sensor array for measuring a spatially-varying magnetic field originating from a first spatially-varying density of metallic particles comprised in a first battery, when subjected to an excitation magnetic field, and processing means operative to acquire a set of values from the sensor array, which set of values represents the spatially-varying magnetic field, and to derive the key from the set of values. The excitation magnetic field is generated by a magnetic-field generator comprised in one of the communications devices. Thereby, the two communications devices may, when in proximity, generate identical keys by probing the spatially-varying density of metallic particles comprised in the first battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.