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특허 검색
구분 출원국
출원년도 ~ 키워드


등록 무선 휴대 인터넷 시스템에서 멀티 캐스트 서비스용 트래픽 암호화 관리 방법

무선 휴대 인터넷 시스템에서 멀티 캐스트 서비스용 트래픽 암호화 관리 방법
이미지 확대
조석헌, 윤철식, 장성철
10591625 (2005.03.04)
20080080713 (2008.04.03)
7907733 (2011.03.15)
Disclosed is a traffic encryption key (TEK) management method for automatically generating a TEK for a multicast or broadcast service by a base station to periodically update a TEK used by a subscriber station. The base station transmits the first Key Update Command message for updating a group key encryption key (GKEK) for encrypting the TEK and the second Key Update Command message for updating the TEK to the subscriber station to update the TEK. The base station establishes an M & B TEK Grace Time which is different from a TEK Grace Time established by the subscriber station, transmits the first message including a new GKEK to the subscriber station through a primary management connection before the M & B TEK Grace Time, and transmits the second message including a new TEK encrypted with the new GKEK thereto through a broadcast connection after the M & B TEK Grace Time.
KSP 제안 키워드
AND operation, Broadcast service, Group key, Key state, Key update, Operation method, State machine, Subscriber station, base station(BS), encryption Key