Reach of Key Management Strategy in Digital Television System

In view of the DTV system demand, from the encryption digital television key production, the key protection, the key renewed the entire key management process which transmitted until the key to carry on the discussion, proposed with the commercial CAS different key management strategy, improved the key production and the renewal way, designed has been suitable for the above digital television decipherment scheme key management plan, through from produced the key the method to reduce the correspondence expenses effectively, might transmit under the limited band width most according to Pass through in the ground clear channel simulation transmission, the simulation result indicated that, this plan deciphers effect and the primitive sound/video frequency difference is not big, therefore this plan has the low mistake sensitivity. Through to the simulation result analysis, proved this article designs the decipherment scheme suits the DTTB system compared to wired environment under CAS.