Assertions Signcryption Scheme in Decentralized Autonomous Trust Environments

Authors:
Mingwu Zhang;Bo Yang;Shenglin Zhu;Wenzheng Zhang
Affiliations:
Department of Computer Science and Engineering, College of Informatics, South China Agricultural University, Guangzhou, P.R. China 510642;Department of Computer Science and Engineering, College of Informatics, South China Agricultural University, Guangzhou, P.R. China 510642;Department of Computer Science and Engineering, College of Informatics, South China Agricultural University, Guangzhou, P.R. China 510642;National Laboratory for Modern Communications, , Chengdu, P.R. China 610041
Venue:
ATC '08 Proceedings of the 5th international conference on Autonomic and Trusted Computing
Year:
2008

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Abstract

Trust management is a crucial approach to authenticate user and protect resource in distributed systems. Trust between two unknown parties in different autonomous domain is established based on the parties properties, by which are proven their qualifications through the disclosure of appropriate credentials. Assertion, described as well-defined uniformly semantic structure entities such as credentials, policies and requests, is encrypted by issuer or authority's public key. In this paper, we propose an efficient assertion security protect model based on signcryption scheme for multiple autonomous domain managers and privacy key generators(PKGs). We proved its security including confidentiality, unforgeability, public verifiability, and ciphertext anonymity under the DBDH assumption in the random oracle model, where the proposed scheme has comparable advantage in security and efficiency to other previous ID-based signcryption schemes in multiple PKGs.