US 5,854,976 A · Subscriber identity authentication in fixed cellular terminals

Abstract

The fixed cellular terminals (TCF) include a subscriber identity module which, in order to permit authentication of the identity of the subscriber (U) without any intervention on his part, is fixed. It is of particular application in fixed cellular terminals (TCF) of the GSM type that form part of an access network based on the infrastructure of acellular mobile network. These subscriber identity modules incorporate the function of the subscriber identification number verification. During the installation stage each fixed cellular terminal (TCF) stores the subscriber identification number, which it later provides to the subscriber identity module making it become fully active when the number supplied coincides with that held in the subscriber identity module. In the initialization process, the fixed cellular terminal (TCF) generates a new subscriber identification number, that it stores internally in its subscriber identity module for use in subsequent reinitializations.

Claims4

Dependent claims

A procedure for authentication of subscriber identity for a fixed cellular terminal (TCF) so as to allow the fixed cellular terminal to be used by a subscriber, said procedure implemented by a subscriber identity module (SIM) incorporated in the fixed cellular terminal (TCF) by making use of a subscriber identification number and by use of an internal memory within the TCF, characterized in that the fixed cellular terminal (TCF) performs the following steps:

storing a first subscriber identification number in the subscriber identity module (SIM),
supplying to the subscriber identity module (SIM) a second subscriber identification number,
fully activating the subscriber identity module (SIM) so as to allow the TCF to be used by the subscriber in the event that the first and second subscriber identification numbers coincide, and
generating a new subscriber identification number and storing this new subscriber identification number in both the internal memory and in the subscriber identity module (SIM) if the first and second subscriber identification numbers coincide.

1 more element

Dependencies are inferred from the claim text.

Subscriber identity authentication in fixed cellular terminals

Life of this patent

Subscriber identity authentication in fixed cellular terminals

Life of this patent

Abstract

Claims4