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首页> 外文期刊>International Journal of Innovative Computing Information and Control >A COPYRIGHT PROTECTION SCHEME BASED ON PDF
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A COPYRIGHT PROTECTION SCHEME BASED ON PDF

机译：基于PDF的版权保护方案

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摘要

The information hiding method in this study was based on PDF files of iso-8859-1 encoding. The hiding method that we discovered can hide information within PDF files, and the hidden information will not be detected of any irregularity by users when reading the PDF files. We developed an encryption technique which combines the information hiding technology of PDF documents and quadratic residue as basis, and applies to copyright protection and digital learning. The copyright owner can use a personal secret key to randomly generate a sequence of characters in PDF documents (or pixels in digital images) to operate with the pixels in the watermark to create verification ciphertexts. The watermark, digital content in PDF format and ciphertext verification are then stored at the copyright registration center. Moreover, by using our scheme, once piracies with the same serial numbers as genuine products are found, their sources can be traced. Furthermore, this encryption technique can also apply to digital learning. The learning questions and answers are first categorized according to their level, in which the characters of the questions and answers are then created with hidden ciphertext. This can prevent the learner from directly seeing the answer before thinking.
机译：本研究中的信息隐藏方法基于iso-8859-1编码的PDF文件。我们发现的隐藏方法可以隐藏PDF文件中的信息，并且用户在阅读PDF文件时不会检测到任何不规则的隐藏信息。我们开发了一种加密技术，该技术结合了PDF文档的信息隐藏技术和二次残差作为基础，并适用于版权保护和数字学习。版权所有者可以使用个人密钥在PDF文档中随机生成一系列字符（或数字图像中的像素），以与水印中的像素一起操作以创建验证密文。然后将水印，PDF格式的数字内容和密文验证存储在版权注册中心。而且，通过使用我们的方案，一旦发现了与正版产品具有相同序列号的海盗，就可以追查其来源。此外，这种加密技术也可以应用于数字学习。首先根据学习的问题和等级对学习的问题和答案进行分类，然后使用隐藏的密文创建问题和答案的特征。这样可以防止学习者在思考之前直接看到答案。

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