Patent ID: 8909919
Filing Date: 2014-12-09
Classification: H04L,H04N

Abstract:
1. A digital television authentication system, comprising: a digital television having a digital television master chip; a Subscriber Identity Module (SIM) card module having a built-in SIM card; and an authentication server wirelessly connected to the SIM card, wherein the SIM card module comprises: a symmetric key generation unit configured to generate a symmetric encryption key CT according to a Session Key (SEK) received by the SIM card and an identity (ID) of the SIM card; and a Control Word (CW) acquisition unit configured to decrypt, according to the symmetric encryption key CT, an Encrypted Control Word (ECW) sent by the authentication server, so as to obtain a CW; wherein the SIM card module is connected to the digital television master chip through a universal interface, and adapted to send the CW to the digital television master chip, so that the digital television master chip performs, according to the CW, descrambling on an encrypted Transport Stream (TS) sent by the authentication server; and wherein the authentication server comprises: an SEK generation unit configured to randomly generate a string and taking the string as an SEK; and an SEK sending unit configured to send the SEK to the SIM card module.