数据安全新思路

利用小波的时频局部化的特征,将信息的加密过程由传统的时域中进行改为在时域和频域中进行,达到信息加密和增强信息安全性的目的。采用两种方法实现信息的加密与解密的过程,一种是将明文保存为图像文件格式,对图像文件进行小波的分解与重构,实现信息的加密与解密;另一种是将明文数值化为一个系数矩阵,对数值矩阵进行小波的分解与重构,实现信息的加密与解密。通过小波分解过程进行加密,小波的重构过程进行解密,改变了传统的在空域中通过一系列的移位、迭代和置换的方式进行的加密过程,因此也不能通过传统的解密方式进行解密,增强了信息的安全性。由于小波的多样性,不同的小波变换得到的结果也会不同,增加了解密的难度,保证了数据的安全。

New Idea about Data Security

Using the characteristic of wavelet's time and frequency localization can change the process of data encoding from time domain to time and frequency domain, and improve data security as well. Wavelet decomposition and wavelet construction could realize the information's encoding and decoding by two methods: one is saving the information as a piece of image, and the other is saving the information as a kind of numerical matrix. Information encoding is realized by wavelet decomposition, and information decoding is realized by wavelet construction. This method changes the traditional encoding process by shift, iteration and displacement in time domain. So the data encoded by the new method can not be decoded by the traditional method, and thus the data security is improved. Meanwhile, using different wavelet will get different results due to the variety characteristic of wavelet, and thus the information security can be further improved.