An efficient, secure color image coder incorporating Color-SPIHT (C-SPIHT) compression and partial encryption is presented. Confidentiality of the image data is achieved by encrypting only the significance bits of ind...
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An efficient, secure color image coder incorporating Color-SPIHT (C-SPIHT) compression and partial encryption is presented. Confidentiality of the image data is achieved by encrypting only the significance bits of individual wavelet coefficients for K iterations of the C-SPIHT algorithm. By varying K, the level of confidentiality vs. processing overhead can be controlled. For K = 2, adequate security is achieved and an average of only 0.40% of bits needed encrypting for test images coded at 0.8 bpp. (c) 2005 Pattern Recognition Society. Published by Elsevier Ltd. All rights reserved.
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