A Mixed Chaotic-cellular Automata Based Encryption Scheme for Compressed Jpeg Images
Rabab Beniani, Kamel Mohamed FARAOUN
Journal of Multimedia Processing and Technologies, Vol. 9, No. 3, 2018.
DOI: https://doi.org/10.6025/jmpt/2018/9/3/88-101
Link: http://www.dline.info/jmpt/fulltext/v9n3/jmptv9n3_2.pdf
Abstract:
In this paper, we propose a new scheme for joint compression and encryption of digital images, based on cellular automata and selective encryption of quantized DCT coefficient. Using a key stream by a cellular automata mechanism, a subset of quantized coefficients is selected and then ciphered with the produced pseudorandom key-stream. Thus, we
achieve a sufficiently robust security level, mostly against known plaintext attacks while preserving a high compression ratio. Several performance analysis including security analysis, speed performances and compression ratio are performed, and demonstrate the efficacy of the proposed approach with respect to existing ones.