| 摘要 |
A method for enabling a mobile telephone to operate in a communications network, including: generating a random authentication number and an expecte d response to the random authentication number, and transmitting a forward sho rt message service (SMS) message incorporating the random authentication number to the mobile telephone. The method further includes generating at the mobil e telephone, responsive to the random authentication number, an authentication response, and receiving from the mobile telephone a return SMS message incorporating the authentication response. The method also includes performi ng a comparison between the authentication response in the return SMS message a nd the expected response, and authenticating the mobile telephone to operate in the communications network responsive to the comparison.
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