%0 Journal Article
%T Image compression and encryption based on DWT and SHA-1<br>小波变换和SHA-1相结合的图像压缩加密
%A Li Yuanyuan
%A Zhang Shaowu
%A <br>李园园
%A 张绍武
%J 中国图象图形学报
%D 2013
%I 
%X For the security of the set partition in hierarchical trees compression, an algorithm of joint image compression and encryption with discrete wavelet transform and secure Hash algorithm-1 (named as DSCE) is proposed in this paper. First, the wavelet transform coefficients of the plain image are divided into a high-frequency and a low-frequency part. Then, the low-frequency coefficients, the initial keys, and the sum of total pixels are the input data of the SHA-1 to output the 160-bit hash value. The 160-bit hash value is used to produce a sub-key and to perturb the initial keys. The high-frequency coefficients are permuted by a sub-key produced with the 160-bit hash value. The initial keys perturbed with 160-bit hash value are used to partially encrypt the high-frequency coefficients encoded with the SPIHT code. Third, the partial encrypted high-frequency coefficients and the initial keys are input to the SHA-1 to output another 160-bit hash value. The hash value is used to produce a sub-key to permute the low-frequency coefficients, and it is also used to perturb the initial keys to encrypt the low-frequency coefficients encoded with Huffman code. This new DSCE algorithm can implement the mutual encryption between low-frequency and high-frequency in the process of compression. The simulation results show that our algorithm not only has a large key space, but also is highly sensitive to both the key and plain-image. Moreover, it can increase the efficiency of image storage and transmission.
%K SPIHT coding
%K secure hash algorithm-1
%K image encryption
%K chaos mapping
%K discrete wavelet transform<br>SPIHT编码
%K SHA-1
%K 图像加密
%K 混沌映射
%K 离散小波变换
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=D06194629680C940ACE75262F54B9D85&aid=2D4A7443505A2F1BD2A54ED7A5BA8644&yid=FF7AA908D58E97FA&vid=13553B2D12F347E8&iid=E158A972A605785F&sid=09D368C679EC819B&eid=895BB10EB8F3BD49&journal_id=1006-8961&journal_name=中国图象图形学报&referenced_num=0&reference_num=12