Method of carrying out an authentication check between a base station and a mobile station in a mobile radio system
First Claim
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1. A method for establishing the authenticity of a network and a mobile station in a mobile radio system, the method comprising the steps of:
- forming in each of the network and the mobile station a first signal and a second signal;
transmitting the first signal formed in the network to the mobile station;
establishing the authenticity of the network by comparing in the mobile station the first signal formed in the mobile station with the first signal received from the network;
transmitting the second signal formed in the mobile station to the network; and
establishing the authenticity of the mobile station by comparing in the network the second signal formed in the network with the second response signal received from the mobile station.
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Abstract
Methods for carrying out an authentication check in a mobile telephone system in which an authentic base station serves a plurality of mobile stations. A prior method carried out a unidirectional check from the base to a calling mobile, permitting a false base to carry out a false authentication check by collecting a number of so-called RAND-Response pairs. To avoid this problem, another unidirectional, base-to-mobile, authentication check and an authentication check from the mobile to the base are carried out. In one embodiment, only the bi-directional authentication check is carried out.
48 Citations
8 Claims
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1. A method for establishing the authenticity of a network and a mobile station in a mobile radio system, the method comprising the steps of:
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forming in each of the network and the mobile station a first signal and a second signal; transmitting the first signal formed in the network to the mobile station; establishing the authenticity of the network by comparing in the mobile station the first signal formed in the mobile station with the first signal received from the network; transmitting the second signal formed in the mobile station to the network; and establishing the authenticity of the mobile station by comparing in the network the second signal formed in the network with the second response signal received from the mobile station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification