Abstract
A member of an intelligence agency needs to receive messages secretly from outside. Except for authorized officers of the agency, no one knows how the members are organized, even a receiver only knows the organization of his/her subordinates. However, existing primitives cannot implement this typical scenario. In this paper, we propose a primitive, referred to as auditable hierarchy-private public-key encryption (AHPE), to address the problem. The system has several important properties: the organization of the members in the agency is hidden from the outside world, but the members can still communicate with the outside secretly; if there exists a suspicious behaviour in one of the members, managers in the system can still discover him/her. Finally, analyses show that the proposed AHPE scheme is efficient and practical.
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Acknowledgment
Qianhong Wu is the corresponding author. This paper is supported by the National Key R&D Program of China under grant No. 2017YFB0802400, the Natural Science Foundation of China through projects 61772538, 61672083, 61370190, 61532021, 61472429, and 61402029, by the National Cryptography Development Fund through project MMJJ20170106.
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Zhong, L., Wu, Q., Qin, B., Zheng, H., Liu, J. (2018). Auditable Hierarchy-Private Public-Key Encryption. In: Susilo, W., Yang, G. (eds) Information Security and Privacy. ACISP 2018. Lecture Notes in Computer Science(), vol 10946. Springer, Cham. https://doi.org/10.1007/978-3-319-93638-3_19
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