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Wireless security has been an active research area since the last decade. A lot of studies of wireless security use cryptographic tools, but traditional cryptographic tools are normally based on computational assumptions, which may turn out to be invalid in the future. Consequently, it is very desirable to build cryptographic tools that do not rely on computational assumptions. In this paper, we focus...
Remote user authentication is a critical component of accessing remote services in distributed applications. In this paper we investigate the security vulnerabilities of a previously proposed remote user authentication scheme. After that we propose a security enhanced remote user password authentication scheme, which effectively prevents the adversary's attacks. The proposed authentication scheme...
Many cloud storage providers declare that they store multiple replicas of clients' data in order to prevent data loss. However, currently there is no guarantee that they actually spend storage for multiple replicas. Recently a multiple-replica provable data possession (MR-PDP) protocol is proposed, which provides clients with the ability to check whether multiple replicas are really stored at the...
A DCT domain image encryption scheme based on chaotic shuffling table is proposed, in which the shuffling tables are generated by several logistic maps. This scheme is robust to normal image processing, such as noising, smoothing, compressing, and even print-scan processing. In this scheme, key space is easy to be adjusted by choosing the number of logistic maps. The encrypted image is still highly...
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