다운로더블 제한 수신 시스템에서의 재인증 처리 장치 및 방법
정영호, 권은정, 권오형, 이수인
- 8539236 (2013.09.17)
- 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 제안 키워드
- Conditional access system, Extraction unit, Re-authentication, conditional access, encryption Key