| 摘要 |
A method of accessing an interactive television service with a code and a mini-message comprising randomly generating a code C 1 by an interactive television application implemented on an interactive television set; sending a mini-message containing the code C 1 to a processing server with a mobile telecommunications device; calculating a code C 2= F(C 1 ) with the processing server; resending the code C 2 with the processing server and receiving the code C 2 on the mobile telecommunications device; entering the C 2 by the user in the interactive television application; calculating the interactive application C 1'= F<SUP>-1 </SUP>(C 2 ); checking that C 1'= C 1 , and enabling the user to access said service; wherein F is a predefined function, and F<SUP>-1 </SUP>is the inverse function of F.
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