Method implementing conditional reception and conditional receiving apparatus
A conditional access and terminal technology, applied in the direction of broadcasting devices, electrical components, broadcasting system control, etc., can solve the problems of CA system damage, CA system cracking, illegal eavesdropping of control words, etc., and achieve the effect of ensuring security
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[0051] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.
[0052] The main idea of the present invention is to encrypt and transmit the control word between the CAM-C and the descrambling module, so that: on the one hand, the CAM-C can normally and independently complete the conditional access function; It is passed to the descrambling module, thereby ensuring the security of the conditional access system while realizing the conditional access function.
[0053] figure 2 It is a schematic flowchart of the method for realizing conditional access in the present invention. see figure 2 , the method includes:
[0054] Step 201: the terminal sends the obtained user key, EMM and ECM to CAM-C;
[0055] Step 202: CAM-C obtains a control word according to the user key, EMM and ECM, encrypts the control word and ...
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