09MS2300, Development of Anonymity-based u-Knowledge Security Technology,
Cho Hyun Sook
Abstract
Boneh 등에 의해 소개되었던 짧은 그룹 서명 기법은 익명성을 지원하는 대표적인 서명 기법이다. 그러나 이를 실제 응용 환경에 적용할 때에는 짧은 그룹 서명 기법이 가진 여러 제한 사항에 대해서 반드시 고려해야한다. 어떤 서비스 제공자의 입장에 있어서는, 사용자의 완전한 익명성이 서비스가 불가능하도록 하는 등의 문제가 있을 수 있다. 따라서 일정 부분 사용자의 익명성을 제한하는 지역 연결성이 필요하다. 또한 그룹 매니저로부터 일방적으로 할당되는 그룹 서명키는 강한 무죄 입증성을 갖지 못하므로, 강한 무죄 입증성을 갖도록 짧은 그룹 서명 기법이 수정되어야할 필요가 있다. 이 논문에서는 이러한 관점에서 실용적인 짧은 그룹 서명 기법에 대한 깊이 있는 고찰하고 이를 바탕으로 지역 연결성과 무죄 입증성의 지원을 위한 몇몇 제안을 한다.
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