Система условного доступа DVB

Conditional Access System makes sure those users who paid can watch while preventing free riders by controlling the programs scrambling and managing subscribers authorization in digital TV system.DSATV Digtial Technology . is China leading supplier of conditional access system, and has been researching and developing the system for 10 years. System functions 1 Controlling the scrambling of TS 2 Managing and delivering the accessing and subscribers authorization information 3 Managing and delivering encrypted CW, key and control orderSecurity 1 Adopting common encryption algorithm, multi­layer key encrypting circulation system 2 Key word updating randomly (5 10 seconds), key updating controlled (sending EMM in air) 3 Adopting broadcasting mode transmission orders such as pausing authorization and deleting selected number of smart cards etc. 4. Supporting valid period control of authorization information to prevent subscribers¡¯televiewing from overdue authorization 5. Smart card security technology 1) Adopting high security CMOS chip 2) Smart card COS is developed by DSATV to ensure security 3) Using various technologies to protect se­curity of data. 4) Adopting common and special encrypt algo­rithm to protect the security of data trans­ferring 5) Code applications and algorithm downloading 6. Authorization mechanics and safety strategy. No inbreak record worldwideConditional Access System DiagramSimulcrypt standard. The Simulcrypt has been accomplished with main CAS products that re­ceiving Standard and compatibility 1. Compatible with international standard having its own SYSTEM ID being registered in DVB orga­nization certificate of network access from the State Administration of Radio Film and Televi­sion of CHINA 2. Be able to integrate with main SMS, multiplexers, scramblers and STB Main features 1 Supporting redundant backup of whole system and having higher efficiency and error recovering ability 2 Real-time monitor of the operating status of system and each component from CAS network management 3 Various control, customizing and authorization modes of products with flexible packing sales strategy, the same program can be sold in different packages. 4 Supporting IPPV, IPPV-T 5 Powerful addressing function: including indi­vidual addressing, group addressing and logic addressing 6 Supporting regional/subscriber control, setting attribute according to addressing mode 7 Application can be downloaded on STB or smart card which change the receive and control functions 8 Short message system: recharge, query and transfer, order and complaint by transmitting short message providing in wireless network 9 Information transfer function: OSD or MAIL 10 Region control function: control subscribers ranging combining with regional address and control information 11 Parent level protection: subscribers can set program levels restriction on STB 12 Fingerprint control: protect value program such as movies, special topic, gym programs etc. 13 Anti-record control: program transferring can be set to allow or forbid to record 14 STB and card pairing: one smart card is tied to the only STB to defend pirate 15 Multi-level CA system (supporting 3 levels CA) 16 Flexible program authorization function: Free authorization, preview authorization, 10 min­utes to 455 days advaned authorization from the first watchingPerformance parameters 1 Maximal subscribers account managed: 3 million 2 Channel account can be controlled: 8*512=4096, classifications:512, topic/levels: 512 3 Maximal sector account: 4(each sector has ab­solute key data, supporting multi-level authorization) 4 Maximal program providers: 8 5 Transmission rate: EMM 100-1500 packet/s (bandwidth 0.15-2.2Mbps), ECM 2-5 packet/ s/channel 6 20 TS can be controlled by one ECMG and EMMG