06MT1200, Developmet of Open API and Service Platform Technologies,
Lee Byung Sun
Abstract
Zheng이 제안한 Signcryption 기법은 전자 서명과 대칭키 암호화를 논리적으로 한 단계에 수행함으로써 기존의 서명 후 암호화 기법들에서 요구되는 계산비용보다 적은 비용을 가지는 새로운 암호학적인 기법이다. 현재까지 제안되어 온 Signcryption 기법들에서는 송신 부인이 발생하여 제3자가 이를 검증해야 할 경우 수신측의 비밀키 노출이 불가피하였다. 이 문제를 해결하기 위해 이 논문에서는 익명성과 Unlinkability를 지원하는 다목적의 ID기반 Signcryption기법을 제안한다. 제안된 기법은 Weil-pairing을 암호화에 이용하면서 random oracle 모델의 안전성을 유지하고, 결정적 쌍선형 Diffie-Hellman 의미론적 보안의 형식적 증명을 따르기 때문에 기존 Signcryption 기법들보다 안전하면서 효율적이다.
KSP Keywords
Diffie-Hellman, Random Oracle
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