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Mobile Information Systems
Volume 2015 (2015), Article ID 430797, 10 pages
http://dx.doi.org/10.1155/2015/430797
Research Article

New Construction of PVPKE Scheme and Its Application in Information Systems and Mobile Communication

1School of Computer Science, Northwestern Polytechnical University, Xi’an 710072, China
2Key Laboratory of Information and Network Security, Engineering University of Chinese Armed Police Force, Xi’an 710086, China

Received 29 August 2014; Accepted 1 September 2014

Academic Editor: David Taniar

Copyright © 2015 Minqing Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In SCN12, Nieto et al. discussed an interesting property of public key encryption with chosen ciphertext security, that is, ciphertexts with public verifiability. Independently, we introduced a new cryptographic primitive, CCA-secure publicly verifiable public key encryption without pairings in the standard model (PVPKE), and discussed its application in proxy reencryption (PRE) and threshold public key encryption (TPKE). In Crypto’09, Hofheiz and Kiltz introduced the group of signed quadratic residues and discussed its application; the most interesting feature of this group is its “gap” property, while the computational problem is as hard as factoring, and the corresponding decisional problem is easy. In this paper, we give new constructions of PVPKE scheme based on signed quadratic residues and analyze their security. We also discuss PVPKE’s important application in modern information systems, such as achieving ciphertext checkable in the cloud setting for the mobile laptop, reducing workload by the gateway between the open internet and the trusted private network, and dropping invalid ciphertext by the routers for helping the network to preserve its communication bandwidth.