一种适应图像特征的数据加密方法

One Adapting Image's Characteristics Method of Data Encryption

数据加密是信息科学中一个重要问题 ,它对于知识产权的保护、防止机密数据外流及情报的安全传递都有很重要的现实意义。文中提出一种利用图像携带加密数据的技术 ,将需要加密的数据隐藏到一幅图像文件中 ,而对宿主文件的效果影响甚微 ,并采用两种数据筛方法 ,即利用图像特征数据筛保持携密图像的带密位仍具有原始图像的特征 ,利用随机数筛消除加密数据的特征 ,从而有效地防止这类图像被识别与解密 ,为私有信息的存储与传递提供安全保障。

Data encryption is one important subject of information science, it means a great deal for protecting knowledge property right,confidental data and transporting intelligence safely,etc. This paper provided a kind of technology to carry about encrypted data in image files which doesn't affect image's appearance obviously. We use two data sift characteristics and random channel model in this method. One is used to keep image's feature for encrypted bit, the other used to eliminate characteristics of encrypted data, so it is not easy to identify such kind of images. It is testified to be advisable for storing and transmitting private information.