Improvement of provably secure self-certified proxy convertible authenticated encryption scheme

Authors

Qi Xie, Hangzhou Normal UniversityFollow
Guilin Wang, University of WollongongFollow
Fubiao Xia, University of BirminghamFollow
Deren Chen, Zhejiang University

RIS ID

73717

Publication Details

Xie, Q., Wang, G., Xia, F. & Chen, D. (2012). Improvement of provably secure self-certified proxy convertible authenticated encryption scheme. ProINCoS 2012: 4th International Conference on Intelligent Networking and Collaborative Systems (pp. 360-364). IEEE Xplore: IEEE.

Abstract

By integrating self-certified public-key systems and the designated verifier proxy signature with message recovery, Wu and Lin proposed the first self-certified proxy convertible authenticated encryption (SP-CAE) scheme and its variants based on discrete logarithm problem (DLP) in 2009. Though their schemes are claimed provably secure, we demonstrate that their schemes are existentially forgeable under adaptive chosen warrants, unconfidentiable and verifiable under adaptive chosen messages and designated verifiers. Then we propose a provably secure SP-CAE scheme in the random oracle model.