Method for certification between digital television set-top box and remote control unit

Abstract

The invention discloses a method for certification between a digital television set-top box and a remote control unit. The method for the certification between the digital television set-top box and the remote unit comprises that certification information of the digital television set-top box and the remote control unit is initialized; a first certification request is sent from the remote control unit to the digital television set-top box; first coded information is decoded by the digital television set-top box and the digital television set-top box sends a second certification request to the remote control unit, wherein the second certification request comprises second coded information for coding the certification information by a random number generated and stochastic noise is added to the second coded information; the second coded information is decoded by the remote control unit, a judgment whether the accuracy of the decoded certification information is in an error range is made and if the result is positive, a third certification request is sent to the digital television set-top box; and third coded information is decoded by the digital television set-top box, comparing a random number got by decoding with the random number generated, if the random numbers are the same, the certification is successful. Safe interaction between the remote control unit and the digital television set-top box is guaranteed and can not receive outside attack easily.

Description

technical field [0001] The invention relates to the technical field of photoelectric communication, in particular to an authentication method between a digital TV set-top box and a remote controller. Background technique [0002] With the rapid development of digital TV technology, more and more attention has been paid to the security of digital TV. During the transition from traditional analog TV to digital TV, a digital TV set-top box is usually used for transition. For the digital TV set-top box, people usually pay attention to the interactive identity authentication between it and the smart card (Smart card), while ignoring the security issue between it and the remote control. The communication channel between the set-top box and the remote controller is open and transparent, which makes the system vulnerable to monitoring and attack by attackers. [0003] In addition, with the increasingly rich digital TV services, users can not only select program channels through th...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the technical problem that the communication channel between the set-top box and the remote controller is open and vulnerable to external attacks in the existing digital TV system, and provides a method for bidirectional authentication between the digital TV set-top box and the remote controller. Include the following steps:

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