Abstract
Recently, Wang et al. presented an efficient logistic map based block encryption system. The encryption system employs feedback ciphertext to achieve plaintext dependence of sub-keys. Unfortunately, we discovered that their scheme is unable to withstand key stream attack. To improve its security, this paper proposes a novel chaotic map based block cryptosystem. At the same time, a secure architecture for camera sensor network is constructed. The network comprises a set of inexpensive camera sensors to capture the images, a sink node equipped with sufficient computation and storage capabilities and a data processing server. The transmission security between the sink node and the server is gained by utilizing the improved cipher. Both theoretical analysis and simulation results indicate that the improved algorithm can overcome the flaws and maintain all the merits of the original cryptosystem. In addition, computational costs and efficiency of the proposed scheme are encouraging for the practical implementation in the real environment as well as camera sensor network.
Highlights
Camera Sensor Networks (CSNs) are usually built with a large number of inexpensive, small and battery-powered devices
This paper presents a modified chaotic block cryptographic algorithm on CSN
A binary sequence Bin {bi ( n ( x))} n 0, where n is the length of the sequence and n (x) is the nth iteration of the logistic map, can be obtained by iterating the logistic map
Summary
Camera Sensor Networks (CSNs) are usually built with a large number of inexpensive, small and battery-powered devices. The sensors have limited power, computation, storage and communication capabilities, they impose several constraints on the algorithms and protocols that can be effectively deployed for such systems In this scenario, most of the traditional security mechanisms are useless. Since Baptista proposed a novel cryptosystem based on the property of ergodicity of chaotic systems [5], a number of new algorithms based on variations of Baptista’s one have been published [6,7]. Most of those modified methods can’t possess both fast encryption speed and flat ciphertext distribution. This paper presents a modified chaotic block cryptographic algorithm on CSN.
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