Abstract:

For the confidentiality and capacity problems of modern information communication network environment, an information hiding method based on digital screening technology was proposed, in which the information is embedded into the digital text documents to achieve the purpose of security communication. In this method, the watermark information was hidden into the background shades composed of screen dots, then fused with shades and stochastic Frequency Modulation (FM) screen dots image. Finally the background shades with information embedded were added to the text document as regular elements. The analysis and experimental results indicate that the proposed method has huge information capacity, and can embed the information of 72000 Chinese characters in one A4 size document page. In addition, it has perfect visual effects, good concealment ability, high security level and small file size, thus it can be widely used in the modern network security communication.

摘要：

针对现代网络环境通信的隐秘性和信息容量问题，提出了一种基于数字加网的信息隐藏算法，通过该算法将秘密信息嵌入文本载体中实现隐秘通信。该算法首先将隐秘信息隐藏在由网点组成的背景底纹图案中，接着与随机生成的半色调调频网点图像相融合，最后将嵌入水印后的背景底纹图案作为常规元素叠加到文本文档的版面中。分析与实验结果表明，该方法可以隐藏的隐秘信息容量大，在A4幅面的文档页面中嵌入72000个汉字的信息量，而且视觉效果美观自然，隐蔽性好，安全性高，文件体积小，可以广泛应用于现代网络安全通信领域。