지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
오류제보하기
Combining the concept of self-certified public key and message recovery, Li-Zhang-Zhu (LZZ) gives the proxy signature scheme with message recovery using self-certified public key. The security of the proposed scheme is based on the discrete logarithm problem (DLP) and one-way hash function (OWHF). Their scheme accomplishes the tasks of public key verification, proxy signature verification, and message recovery in a logically single step. In addition, their scheme satisfies all properties of strong proxy signature and does not use secure channel in the communication between the original signer and the proxy signer. In this paper, it is shown that in their signature scheme a malicious signer can cheat the system authority (SA), by obtaining a proxy signature key without the permission of the original signer. At the same time malicious original signer can also cheat the SA, he can also obtain a proxy signature key without the permission of the proxy signer. An improved signature scheme is being proposed, which involves the remedial measures to get rid of security flaws of the LZZ et al.'s. The security and performance analysis shows that the proposed signature scheme is maintaining higher level of security, with little bit of computational complexity.
목차
등록된 정보가 없습니다.
참고문헌 (22)
참고문헌 신청
1999 / The elliptic curve digital signature algorithm (ECDSA)
W. Diffe / 1976 / New directions in cryptography / IEEE Trans. Inform. Theory IT-22:644~654
T. ElGamal / 1985 / A public key cryptosystem and a signature scheme based on discrete loga-rithms / IEEE Trans. Inform. Theory IT-31:469~472
M. Girault / 1991 / Self-certi ed public keys / Advances in Cryptology Eurocrypt' 91 :491~497
C. L. Hsu / 2004 / Effcient proxy signature schemes using self-certified public keys / Appl. Math. Comput 152(3):807~820
W. Diffe / 1976 / New directions in cryptography / IEEE Trans. Inform. Theory IT-22:644~654
T. ElGamal / 1985 / A public key cryptosystem and a signature scheme based on discrete loga-rithms / IEEE Trans. Inform. Theory IT-31:469~472
M. Girault / 1991 / Self-certi ed public keys / Advances in Cryptology Eurocrypt' 91 :491~497
C. L. Hsu / 2004 / Effcient proxy signature schemes using self-certified public keys / Appl. Math. Comput 152(3):807~820
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