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Modified data encryption standard encryption algorithm with improved error performance and enhanced security in wireless fading channels

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SECURITY AND COMMUNICATION NETWORKS 2015年第4期8卷 565-573页

作者： Zibideh, Walid Y. Matalgah, Mustafa M. Univ Mississippi Ctr Wireless Commun Dept Elect Engn University MS 38677 USA

encryption is becoming a vital process to ensure security over the wireless channel. However, using well-known encryption algorithms to encrypt data in wireless communication results in a catastrophic error because of the avalanche effect, which is an inherited criterion to ensure security. Although this criterion is desirable, these algorithms do not take into account the error characteristics of the wireless channel. Therefore, if an error occurs in the encrypted data over the channel, the decryption process at the receiver results in half the original bits to be in error because of this criterion. Hence, the need for a new secure encryption algorithm that takes into account the error characteristics of the wireless channel becomes necessary. In this paper, we propose a modification to the data encryption standard (DES) to make it secure and immune to errors caused by the wireless channel. We observe that using the modified algorithm in wireless channels improves the bit error rate performance as well as security compared with DES. We consider an additive white Gaussian noise with fading and evaluate the performance of the proposed algorithm in terms of bit error rate. We also show that the proposed algorithm is secure as compared with DES. Copyright (c) 2014 John Wiley & Sons, Ltd.

关键词： encryption data encryption standard avalanche criterion error performance wireless channel security encryption complexity

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Computational complexity Analysis for a Class of Symmetric Cryptosystems Using Simple Arithmetic Operations and Memory Access Time

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INTERNATIONAL JOURNAL OF INFORMATION SECURITY AND PRIVACY 2013年第1期7卷 63-75页

作者： Zibideh, Walid Y. Matalgah, Mustafa M. Qualcomm San Diego CA 92121 USA Univ Mississippi Dept Elect Engn University MS 38677 USA

A secure cryptosystem could be very complicated, time consuming and hard to implement. Therefore, the complexity of the cryptosystem should be taken into account during design and implementation. In this work, the authors introduce a comprehensive and platform independent complexity analysis for a class of symmetric block cryptosystems, by which it will be easier to evaluate the performance of some used cryptosystems. Previous works lacked the comprehensiveness in their analysis, due to the fact that the memory access time was completely ignored, which greatly degrades the accuracy of the analysis and limits it to one data block only. In this paper the authors analytically compute the complexity for a class of symmetric cryptosystems in terms of the number of the clock cycles required and in terms of the required time for encryption/decryption, independently of the hardware or software used in the encryption/decryption process. Moreover, this is the first complexity analysis that considers the required time to access and retrieve information from memory, which makes the analysis more comprehensive and accurate than previous work as well as being general for any number of encryption data blocks. In addition, computer simulations are used to truly evaluate the accuracy of the analysis and to show how the analytical results match the simulation results.

关键词： 3-DES Advanced encryption Standard (AES) Data encryption Standard (DES) encryption complexity Modified Data encryption Standard (M-DES)

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Hardware Solution of Chaos Based Image encryption

Hardware Solution of Chaos Based Image Encryption

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IEEE Symposium on Design and Diagnostics of Electronic Circuits and Systems

作者： Giesl, Jiri Behal, Ladislav Vlcek, Karel Tomas Bata Univ Zlin Dept Appl Informat Zlin 76005 Czech Republic

ISBN: (纸本)9781424433391

Many image encryption schemes based on chaotic iterative maps are very expensive in terms of processing speed. This inconvenient feature causes the inapplicability in real-time processes. Hence, encryption scheme must be projected at low-level. This paper proposes hardware solution of image encryption with keeping the high security of encrypted image and speeding up the encryption process.

关键词： image encryption chaos encryption encryption complexity embedded algorithm

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