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Image encryption with fractional wavelet packet method
Authors:Linfei Chen  Daomu Zhao  
Institution:aDepartment of Physics, Zhejiang University, Hangzhou 310027, China
Abstract:We introduce a new method called fractional wavelet packet transform to encrypt images in this paper, in which fractional orders and wavelet packet filter are its two series of keys. Fractional orders are additional keys in this method compared to wavelet packet encryptions. Selected image encryption is also proposed in this paper, and it is quite more flexible and effective than wavelet, fractional wavelet or wavelet packet encryptions. The possible optical implementation and digital computation are proposed. Computer simulations prove its feasibility.
Keywords:Image encryption  Decryption  Wavelet packet transform  Fractional Fourier transform  Fractional wavelet packet transform
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