A Synchronization Scheme for Image Compression and Encryption Based on SPIHT
Changjiu Pu · International Journal of Applied Mathematics & Statistics/International journal of applied mathematics and statistics · 2013
In order to meet the demand for synchronously implementing image compression and encryption in some systems, a novel image compression and encryption scheme based on Set Partitioning in Hierarchical Trees (SPIHT) and multiple chaotic maps is presented. First, the key array and the 160-bit hash key are generated using the chaotic mapping and plain-image. Then, the scheme implements confusion of part of the image after discrete wavelet transform(DWT) and diffusion in some different types of SPIHT coded bit and image data in the encoding process of SPIHT using the hash key and inputted key. Finally, the experimental result and theoretical analysis shows that the scheme has good compression and encryption effects and has a huge key space to effectively prevent violent attacks.