Multi-proxy signatures based on diffie-hellman problems allowing repeated delegations

Authors:
So-Young Park;Sang-Ho Lee
Affiliations:
Dept. of Computer Science and Engineering, Ewha Womans University, Seoul, Korea;Dept. of Computer Science and Engineering, Ewha Womans University, Seoul, Korea
Venue:
HSI'05 Proceedings of the 3rd international conference on Human Society@Internet: web and Communication Technologies and Internet-Related Social Issues
Year:
2005

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Abstract

Because the Internet is vast and insecure, strong cryptographic protocols are required to support secure communication. In this paper, we propose an efficient way to perform secure delegations in a hierarchical group. We propose a practical multi-proxy signature scheme applicable to hierarchial organization using the Diffie-Hellman problem and secret sharing without secure channels. In addition, we improve the proposed scheme to a dynamic one allowing repeated delegations.