Dissertation > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality > Encryption and decryption

Novel Methods for Encrypting Images Based on Blind Source Separation

Author ChenShu
Tutor HanTaiLin
School Changchun University of Science and Technology
Course Information and Communication Engineering
Keywords Image Encryption Blind Source Separation IndependentComponent Analysis Matrix Convolution Kronecker product
CLC TP309.7
Type Master's thesis
Year 2012
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Image transmitted across the channel security, this structure image encryption pr-inciples based on blind sources separation matrix of two underdetermine encryption, encrypted result is improved.In this article, the author based on basic principles of underdetermine BBS problem, respectively using the Kronecker product of matrices and matrix convolution to construct underdetermine encryption mixed matrix, Ae=[B,D](?C, Ae=B*C,to improve the sensitivity of mixing matrix on plaintexts, to known-plaintext attack, chosen-plaintext attacks and chosen-ciphertext attacks, and other modern attack have higher resistance; use chaos iteration of pseudo random sequence as key images, to mask plain-images; Last use Fast ICA algorithm to decrypt the mixed images.By MATLAB simulation software, prove its transmission in the simulation environment is the image can be encrypted, noise in the image to cover image in clear text; from the calculation of RMSE and SNR it can be concluded that the encrypting matrix encryption has been greatly improved.

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