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http://dx.doi.org/10.3745/KIPSTC.2012.19C.1.039

Key Distribution Scheme for Supporting Multiple Set-Top Box in Chipset Pairing Conditional Access System  

Lee, Hoon-Jung (한양대학교 컴퓨터공학과)
Son, Jung-Gab (한양대학교 컴퓨터공학과)
Oh, Hee-Kuck (한양대학교 컴퓨터공학과)
Publication Information
The KIPS Transactions:PartC / v.19C, no.1, 2012 , pp. 39-46 More about this Journal
Abstract
In this paper, we propose a key distribution scheme for flexible chipset pairing conditional access system. Chipset pairing conditional access system is the implementation of CA (Conditional Access) module by using both embedded secure chip in a Set-Top Box(STB) and smartcard, and the secure chip embedded in a STB forms a secure channel between the smartcard and the STB. In short, it is the system that a smartcard outputs encrypted CW (Control Word) to the STB, and the STB decrypts an encrypted CW by using the embedded secure chip. The drawback of this chipset pairing conditional access system is that one smartcard is able to be used for only one specified STB since it is the system using the STB bound to a smartcard. However, the key distribution scheme proposed in this paper overcomes a drawback of current chipset pairing conditional access system by using Chinese Remainder Theorem(CRT). To be specific, with this scheme, one smartcard can be used for multiple, not single, STBs, and applied to current chipset pairing without great changes.
Keywords
Key Distribution Scheme; Grouip Key; IPTV; Conditional Access System;
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