Desktop cellular phone having SIM card-related security...

Details Desktop cellular phone having SIM card-related security... Desktop cellular phone having SIM card-related security...

2007-07-24

2007-07-24

Urban, Edward F. (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S411000, C713S169000

Reexamination Certificate

active

10986734

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.

REFERENCES:
patent: 6263214 (2001-07-01), Yazaki et al.
patent: 6898708 (2005-05-01), Hori et al.
patent: 6934531 (2005-08-01), Hake et al.
patent: 2001/0030235 (2001-10-01), Hedemann et al.
patent: 2004/0111614 (2004-06-01), Yamada
patent: 2005/0075092 (2005-04-01), Kim
patent: 2005/0181829 (2005-08-01), Cho et al.

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