Security of multimedia data is a major concern due to its widespread transmission over various communication channels. Hence, design and study of good image encryption schemes has become a major research topic. During the last few decades, there has been an increase in chaos-based cryptography. This paper proposes an attack on a recently proposed chaos-based image encryption scheme. The cryptosystem under study proceeded by first shuffling the original image to disturb the arrangement of pixels by applying a chaotic map several times. Second, a key stream is generated using Chen’s chaotic system to mix it with the shuffled pixels to finally obtain the cipher image. A chosen-ciphertext attack can be done to recover the system without any knowledge of the key. It simply demands two pairs of plaintext–ciphertext to completely break the cryptosystem.
CITATION STYLE
Mukherjee, P., Rarhi, K., Mishra, A., & Bhattacharya, A. (2019). Cryptanalysis of a chaotic key-based image encryption scheme. In Advances in Intelligent Systems and Computing (Vol. 814, pp. 165–173). Springer Verlag. https://doi.org/10.1007/978-981-13-1501-5_14
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