Desktop cellular phone having SIM card-related security features
US7248896B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 2004 |
| Grant date | Jul 24, 2007 |
| Priority date | — |
| Expiry date | Jan 18, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/02
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method for securing a desktop cellular phone, having a SIM card inserted therein, includes turning on the phone and sending first data from a SIM card processor to the phone processor. The phone processor computes second data, using a first algorithm and the first data, and sends the second data to the SIM card processor. Meanwhile, the SIM card processor computes third data using a second algorithm and the first data. The SIM card processor compares the second data to the third data, and determines whether a relationship between the second data and the third data satisfies a first predefined requirement. If it does not, operation of the phone is, at least in part, prevented. Similar steps may additionally, or alternatively, be performed by the phone processor to verify that an authorized SIM card is inserted in the phone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.