A new fast color image encryption scheme using chen chaotic system
| Autor: | Wei Zhao, Zhou-feng Chen, Hui-yan Jiang, Chong Fu |
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| Rok vydání: | 2017 |
| Předmět: |
Sequence
Computer science business.industry ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Chaotic 02 engineering and technology Color space Encryption 01 natural sciences 010305 fluids & plasmas Image (mathematics) Permutation 0103 physical sciences Ciphertext 0202 electrical engineering electronic engineering information engineering Key (cryptography) 020201 artificial intelligence & image processing business Algorithm Computer Science::Cryptography and Security |
| Zdroj: | SNPD |
| DOI: | 10.1109/snpd.2017.8022710 |
| Popis: | Recently, a number of chaos-based image ciphers with permutation-substitution structure have been suggested. Generally, the permutation and substitution are considered as two independent procedures, and individual chaotic maps or systems are iterated and quantified to produce the keystreams for the two stages. In this paper, we suggest a fast color image encryption scheme with both permutation and substitution keystreams quantified from a sequence extracted from the orbit of chaotic Chen's system. As the total number of iterations is reduced by half, the computational efficiency is improved. To confuse the relationship between the ciphertext and the secret key, the positions of subpixels in each color channel are scrambled across the entire color space using a pixel-swapping strategy, which can avoid the periodicity problem encountered by the discretized version of area-preserving chaotic maps. Experimental results demonstrate that the proposed scheme has a satisfactory level of security and outperforms the conventional scheme in term of computational efficiency. |
| Databáze: | OpenAIRE |
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