Method of protecting a mobile-telephone-type telecommunication terminal
US9313662B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2004 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Jan 27, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/02
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of protecting a telecommunication terminal having a chip-card-type personal component which is required for telecommunication network access. The terminal includes a processing unit, at least one operating memory element containing the information necessary to the operation of the terminal, i.e. a terminal operating program, and the data necessary to the program. The method involves: a) encrypting the contents of the operating memory element of the telecommunication terminal using a pre-determined key K which is necessary for decryption; and b) allowing the terminal to commence decryption once the terminal has been started with a start-up program that is saved in a secure memory element and once the key for decryption has been calculated by same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.