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Mobile Information Systems
Volume 2015 (2015), Article ID 626415, 11 pages
Research Article

Server-Aided Verification Signature with Privacy for Mobile Computing

1School of Computer Science and Engineering, South China University of Technology, Guangzhou 510006, China
2School of Computer Science and Educational Software, Guangzhou University, Guangzhou 510006, China
3Khalifa University of Science, Technology and Research, P.O. Box 127788, Abu Dhabi, UAE

Received 6 May 2014; Accepted 1 September 2014

Academic Editor: David Taniar

Copyright © 2015 Lingling Xu 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.


With the development of wireless technology, much data communication and processing has been conducted in mobile devices with wireless connection. As we know that the mobile devices will always be resource-poor relative to static ones though they will improve in absolute ability, therefore, they cannot process some expensive computational tasks due to the constrained computational resources. According to this problem, server-aided computing has been studied in which the power-constrained mobile devices can outsource some expensive computation to a server with powerful resources in order to reduce their computational load. However, in existing server-aided verification signature schemes, the server can learn some information about the message-signature pair to be verified, which is undesirable especially when the message includes some secret information. In this paper, we mainly study the server-aided verification signatures with privacy in which the message-signature pair to be verified can be protected from the server. Two definitions of privacy for server-aided verification signatures are presented under collusion attacks between the server and the signer. Then based on existing signatures, two concrete server-aided verification signature schemes with privacy are proposed which are both proved secure.