Hierarchical conditional proxy re-encryption

Authors

Liming Fang, Nanjing University of Aeronautics and Astronautics
Willy Susilo, University of WollongongFollow
Chunpeng Ge, Nanjing University of Aeronautics and Astronautics
Jiandong Wang, Nanjing University of Aeronautics and Astronautics

RIS ID

53656

Publication Details

Fang, L., Susilo, W., Ge, C. & Wang, J. (2012). Hierarchical conditional proxy re-encryption. Computer Standards and Interfaces, 34 (4), 380-389.

Abstract

In this paper, we introduce a new primitive called hierarchical conditional proxy re-encryption (HC-PRE) that enhances the concept of C-PRE by allowing more general re-encryption key delegation patterns. Hierarchical conditional proxy re-encryption (HC-PRE) scheme is the hierarchical extension of conditional proxy re-encryption (C-PRE) where the condition is a vector of keywords. We present an efficient construction of hierarchical key derivation C-PRE scheme where the ciphertext length is independent from the depth of the hierarchy. We further extend our work by presenting a more generalized key delegation, by allowing the use of a wildcard in the keyword vector.