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Transferring multimedia files like audio is a common problem with information security. Therefore, various encryption technologies are needed to protect these contents. This paper proposes a new audio encryption scheme that provides a high degree of security. The novelty of this scheme is the use of chaotic systems and DNA coding to confuse and diffuse audio data. The initial value of the chaotic system is controlled by the hash value of the audio, making the chaotic trajectory unpredictable. Comparison experiments using different types of audio show that the algorithm works well and is secure enough to withstand many common attacks and can be recommended for multi-channel audio processing.INDEX TERMS Audio encryption, chaotic system, confusion and diffusion, DNA coding.

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Combining the advantages of structured random measurement matrix and chaotic structure, this paper introduces a color image encryption algorithm based on a structural chaotic measurement matrix and random phase mask. The Chebyshev chaotic sequence is used in the algorithm to generate the flip permutation matrix, the sampling subset and the chaotic cyclic matrix for constructing the structure perceptual matrix and the random phase mask. The original image is compressed and encrypted simultaneously by compressed sensing, and re-encrypted by two-dimensional fractional Fourier transform. Simulation experiments show the effectiveness and reliability of the algorithm.

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