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


The KIPS Transactions:PartC, Vol. 19, No. 1, pp. 39-46, Feb. 2012
10.3745/KIPSTC.2012.19.1.39,   PDF Download:

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.


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Cite this article
[IEEE Style]
H. J. Lee, J. G. Son, H. K. Oh, "Key Distribution Scheme for Supporting Multiple Set-Top Box in Chipset Pairing Conditional Access System," The KIPS Transactions:PartC, vol. 19, no. 1, pp. 39-46, 2012. DOI: 10.3745/KIPSTC.2012.19.1.39.

[ACM Style]
Hoon Jung Lee, Jung Gab Son, and Hee Kuck Oh. 2012. Key Distribution Scheme for Supporting Multiple Set-Top Box in Chipset Pairing Conditional Access System. The KIPS Transactions:PartC, 19, 1, (2012), 39-46. DOI: 10.3745/KIPSTC.2012.19.1.39.