System and method for authenticating subscribers of a transmission network and subscription, having differing authentication procedures, using a common authentication center
First Claim
1. A subscriber authentication method in a telecommunication system comprising a transmission network having subscriber identity codes of a first format, a first subscriber authentication procedure and at least one exchange;
- a subsystem connected to said exchange and having subscriber identity codes of a second format and a second subscriber authentication procedure, the calls of the subscribers of the subsystem being routed through the transmission network and said exchange, said method comprising the steps of;
sending by the transmission network an authentication message containing a first authentication parameter to the subscriber through a said exchange;
generating by the subscriber a second authentication parameter in response to the received first authentication parameter and sending it through said exchange as an authentication response to the transmission network;
comparing by the transmission network the second authentication parameter generated by the subscriber with a corresponding reference parameter and considering the subscriber as correctly authenticated if the second authentication parameter and the reference parameter are equal;
employing by the transmission network for identification of a subscriber of the subsystem a subscriber identity code converted from the second format to the first format and containing a system code indicating that the identity code belongs to a subscriber of the subsystem;
employing by the transmission network for authentication of a subscriber a pair of the first authentication parameter and the reference parameter, generated according to the authentication procedure of the transmission system, when a subscriber identity code belongs to a subscriber of the transmission system; and
employing by the transmission network for authentication of a subscriber a pair of the first authentication parameter and the reference parameter, generated according to the authentication procedure of the subsystem, when a subscriber identity code belongs to a subscriber of the subsystem.
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Abstract
A telecommunication system and a method for authenticating a subscriber in a telecommunication system. The system includes a transmission network having subscriber identity codes of a first format and a first subscriber authentication procedure. An exchange of the transmission network is connected to a subsystem having subscriber identity codes of a second format and a second subscriber authentication procedure. The calls of the subscribers of the subsystem are routed through the transmission network and the exchange. The authentication of both subscriber types is enabled in the transmission network by locating the parameter generation algorithms of both the first and the second authentication procedure in a transmission network authentication center. The proper algorithm for each subscriber to be authenticated is selected on the basis of the type of the subscriber.
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Citations
5 Claims
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1. A subscriber authentication method in a telecommunication system comprising a transmission network having subscriber identity codes of a first format, a first subscriber authentication procedure and at least one exchange;
- a subsystem connected to said exchange and having subscriber identity codes of a second format and a second subscriber authentication procedure, the calls of the subscribers of the subsystem being routed through the transmission network and said exchange, said method comprising the steps of;
sending by the transmission network an authentication message containing a first authentication parameter to the subscriber through a said exchange; generating by the subscriber a second authentication parameter in response to the received first authentication parameter and sending it through said exchange as an authentication response to the transmission network; comparing by the transmission network the second authentication parameter generated by the subscriber with a corresponding reference parameter and considering the subscriber as correctly authenticated if the second authentication parameter and the reference parameter are equal; employing by the transmission network for identification of a subscriber of the subsystem a subscriber identity code converted from the second format to the first format and containing a system code indicating that the identity code belongs to a subscriber of the subsystem; employing by the transmission network for authentication of a subscriber a pair of the first authentication parameter and the reference parameter, generated according to the authentication procedure of the transmission system, when a subscriber identity code belongs to a subscriber of the transmission system; and employing by the transmission network for authentication of a subscriber a pair of the first authentication parameter and the reference parameter, generated according to the authentication procedure of the subsystem, when a subscriber identity code belongs to a subscriber of the subsystem. - View Dependent Claims (2, 3, 4, 5)
- a subsystem connected to said exchange and having subscriber identity codes of a second format and a second subscriber authentication procedure, the calls of the subscribers of the subsystem being routed through the transmission network and said exchange, said method comprising the steps of;
Specification