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A 1 Gbps Chaos-Based Stream Cipher Implemented in 0.18 μm CMOS Technology

Group of Electronic Design, University of Zaragoza, 50009 Zaragoza, Spain
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Electronics 2019, 8(6), 623; https://doi.org/10.3390/electronics8060623
Received: 15 May 2019 / Revised: 28 May 2019 / Accepted: 29 May 2019 / Published: 1 June 2019
(This article belongs to the Section Circuit and Signal Processing)
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Abstract

In this work, a novel chaos-based stream cipher based on a skew tent map is proposed and implemented in a 0.18 μm CMOS (Complementary Metal-Oxide-Semiconductor) technology. The proposed ciphering algorithm uses a linear feedback shift register that perturbs the orbits generated by the skew tent map after each iteration. This way, the randomness of the generated sequences is considerably improved. The implemented stream cipher was capable of achieving encryption speeds of 1 Gbps by using an approximate area of ~ 20 , 000 2-NAND equivalent gates, with a power consumption of 24.1 mW. To test the security of the proposed cipher, the generated keystreams were subjected to National Institute of Standards and Technology (NIST) randomness tests, proving that they were undistinguishable from truly random sequences. Finally, other security aspects such as the key sensitivity, key space size, and security against reconstruction attacks were studied, proving that the stream cipher is secure. View Full-Text
Keywords: stream cipher; PRNG; cryptography; chaotic map; skew tent map stream cipher; PRNG; cryptography; chaotic map; skew tent map
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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 (CC BY 4.0).
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Garcia-Bosque, M.; Díez-Señorans, G.; Pérez-Resa, A.; Sánchez-Azqueta, C.; Aldea, C.; Celma, S. A 1 Gbps Chaos-Based Stream Cipher Implemented in 0.18 μm CMOS Technology. Electronics 2019, 8, 623.

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