Please use this identifier to cite or link to this item:
http://repository.aaup.edu/jspui/handle/123456789/2906
Title: | An Enhanced Encryption Scheme for Wireless Visual Sensor Networks رسالة ماجستير |
Authors: | Sabaneh, Kefaya Tayseer$AAUP$Palestinian |
Keywords: | networks,wireles multimedia,algorithms |
Issue Date: | 2018 |
Publisher: | AAUP |
Abstract: | Wireless Sensor Networks (WSNs) are increasingly gaining attention. Recent improvements in WSN that are represented by the incorporation of camera sensor nodes in Wireless Visual Sensor Network (WVSN) has attracted the employment of the technology in a broad range of new monitoring and tracking systems. The diversity in these systems demands various and variable security requirements. Accordingly, several approaches have been presented to address the issue of image security in WVSN. To assure the main security requirements in the constrained WVSN nodes, conventional cryptographic algorithms have been studied deeply to investigate their applicability and performance implications, including their computational overhead, required storage and energy consumption. Moreover, to overcome the inability of these algorithms to provide real time image encryption, and due to the bulky data size in WVSN compared with scalar data, new approaches in image encryption have been proposed, including discretized chaotic based image crypto-systems and modified conventional cryptosystems. In addition to that, to address the problem and reduce the required resources, other approaches have employed partial (selective) image encryption to reduce the amount of the encrypted content, and prolong the network lifetime as a whole . In this work, we tackle the issue of image encryption in WVSN using an enhanced image encryption scheme (EIES) in which a modified AES algorithm is employed to encrypt images within WVSN adaptively, according to the application requirements. In the first version of EIES we have employed a modified AES in CBC mode of operation using a chaotic based bit-level permutation step. We have evaluated the security of the our scheme using several security analysis including the key space analysis, key !VI sensitivity analysis, statistical and differential analysis. In addition to that, we have calculated the encryption algorithm’s runtime, and compared it with other recent schemes to show the superior enhancement incorporated by our scheme. Accordingly, the obtained security analysis provided comparable results with respect to other works from the state-of-the-art with a reduced execution time. Most of the available works in the domain of image encryption in WVSN including the EIES in its first version suffer from the unstable resistance against differential attack. Based on that, in the second version of our scheme the combination between bidirectional partial image encryption, chaotic-based bit level permutation, and AES in CBC mode of operation guarantees the security of the transmitted images, with a reduced resource consumption, and minimized encryption time. Based on the conducted security analysis, EIES in its second version has proven its ability to provide an enhanced diffusion property, and resist against several statistical and differential attacks, in addition to brute force attacks. Also, our scheme provides a significant reduction in the encryption time to 14% of the time required for the original AES-128 encryption algorithm. |
Description: | Master’s degree in Computer Science |
URI: | http://repository.aaup.edu/jspui/handle/123456789/2906 |
Appears in Collections: | Master Theses and Ph.D. Dissertations |
Files in This Item:
File | Description | Size | Format | |
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كفاية سباعنة.pdf | 17.52 MB | Adobe PDF | View/Open |
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