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Efficient Image Encryption and Authentication Scheme Based on Chaotic Sequences

Authors:
Mousa Farajallah
Zeinab Fawaz
Safwan El Assad
Olivier Deforges

Keywords: Chaos-based cryptosystem; Image encryption/authentication algorithm; Chaoti cgenerator; security analysis.

Abstract:
Many image encryption algorithms based on chaos have been proposed since 1989. Most of them are slow and use a secret key of encryption/decryption independent of the plain image. We introduce a new fast and secure image encryption and authentication scheme based on the chaotic sequences. The main structure of the proposed algorithm consists of two layers (substitution and permutation) for encryption and decryption image values, and two components: a hash function and a chaotic generator. The hash function generate the secret key of the chaotic generator that provides the dynamic keys for the substitution-permutation layers, while the secret hash key is used to authenticate the decrypted image. The proposed algorithm is at least ten times faster than the AES (Advanced Encryption Standard) algorithm and faster than many chaos-based encryption algorithms of the literature. Furthermore, it is very secure against chosen/known plaintext and statistical attacks because the key of the chaotic generator is dependent on the plain-image. Simulation results show that the efficient performance is reached in only one round.

Pages: 150 to 155

Copyright: Copyright (c) IARIA, 2013

Publication date: August 25, 2013

Published in: conference

ISSN: 2162-2116

ISBN: 978-1-61208-298-1

Location: Barcelona, Spain

Dates: from August 25, 2013 to August 31, 2013