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Registered RE-AUTHENTICATION APPARATUS AND METHOD IN DOWNLOADABLE CONDITIONAL ACCESS SYSTEM

다운로더블 제한 수신 시스템에서의 재인증 처리 장치 및 방법
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Inventors
Jeong Young Ho, Kwon Eun Jung, Lee Soo In, Kwon O Hyung
Application No.
12692266 (2010.01.22)
Publication No.
20110078444 (2011.03.31)
Registration No.
8539236 (2013.09.17)
Country
UNITED STATES
Project Code
09MR3300, The Development of Downloadable Conditional Access System, Kwon O Hyung
Abstract
Provided is a re-authentication apparatus in a Downloadable Conditional Access System (DCAS), the re-authentication apparatus includes: a receiving unit to receive a key request message from a Secure Micro (SM); a determination unit to determine whether to perform re-authentication depending on downloading of SM client image; an identification unit to identify an SM identifier using the key request message, when the re-authentication is performed as a result of the determination; an extraction unit to retrieve previous session information corresponding to the SM identifier and to extract keying information about the previous session information; and an encryption unit to control an encryption key about the SM client image to be reused, the SM client image being encrypted in a previous session based on the previous session information using the keying information.
KSP Keywords
Conditional access system, Extraction unit, Re-authentication, conditional access, encryption Key