Journal
OPTICS AND LASERS IN ENGINEERING
Volume 107, Issue -, Pages 370-379Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlaseng.2017.06.015
Keywords
Hash function; Cyclic shift; Chaotic sequences; PWLCM; Image encryption
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Funding
- National Natural Science Foundation of China [61672124, 61370145, 61173183]
- Password Theory Project of the 13th Five-Year Plan National Cryptography Development Fund [MMJJ20170203]
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This paper proposes a new one-time pad scheme for chaotic image encryption that is based on the multiple mixed hash functions and the cyclic-shift function. The initial value is generated using both information of the plaintext image and the chaotic sequences, which are calculated from the SHA1 and MD5 hash algorithms. The scrambling sequences are generated by the nonlinear equations and logistic map. This paper aims to improve the deficiencies of traditional Baptista algorithms and its improved algorithms. We employ the cyclic-shift function and piece-wise linear chaotic maps (PWLCM), which give each shift number the characteristics of chaos, to diffuse the image. Experimental results and security analysis show that the new scheme has better security and can resist common attacks. (C) 2017 Elsevier Ltd. All rights reserved.
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