Checking the identification number of a mobile subscriber

Details Checking the identification number of a mobile subscriber Checking the identification number of a mobile subscriber

1996-11-21

1999-05-25

Wolfe, Willis R.

Telecommunications

Radiotelephone system

Security or fraud prevention

34082534, 455550, H04Q 732, H04M 1100

Patent

active

059078049

ABSTRACT:
The invention relates to method for checking a personal identification number (PIN) of a subscriber in a mobile equipment (500) employed in a mobile communications system (600), the mobile equipment containing a protected subscriber identity (IMSI, ITSI). The method comprises the steps of requesting (203) the user of the mobile equipment the personal identification number (PIN) of the subscriber, checking (103) the validity of the personal identification number entered by the user, repeating (109) these steps provided that the user does not enter the valid personal identification number, and, when the number of requests (203) and checks (103) of the identification number exceeds a predetermined threshold value, blocking (111) the mobile equipment. According to the invention, protection of a protected subscriber identity is released (112), thus finding out the identity of the subscriber; the subscriber identity as well as and an indication that the mobile equipment has been blocked are transmitted the mobile communications system.

REFERENCES:
patent: 4843385 (1989-06-01), Borras
patent: 5297191 (1994-03-01), Gerszberg
patent: 5551073 (1996-08-01), Sammarco
patent: 5612682 (1997-03-01), DeLuca et al.
patent: 5842124 (1998-11-01), Kenagy et al.
Farrugia et al, Smart Card Technology Applied to the future European Cellular . . . , Smart Cart 2000 1991 Elsevier Science Publishers, B.V, Jan. 1991.
Donn, Smart cards in GSM, Elektron--Feb. 1994 (South Africa).
European digital cellular telecommunications system (Phase2); Subscriber Identity Modules (SIM) Functional characteristics (GSM 02.17), European Telecommunication Standard, Final Draft pr ETS 300 509, May 1994, p. 15.
European digital cellular telecommunications system (Phase 2); Specification of the Subscriber Identity Module--Mobile Equipment (SIM-ME) interface (GSM 11.11); European Telecommunication Standard, Final Draft pr ETS 300 608, Nov. 1994, pp. 1-93.

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