【作者】 周国祥； 顾钧；

【Author】 Zhou Guoxiang~1,Gu Jun~2 1(School of Computer Science and Technology,Hefei University of Technology,Hefei 230009,China) 2(School of Computer Science and Technology,Hefei University of Technology,Hefei 230009,China)

【机构】 合肥工业大学计算机与信息学院；

【摘要】 传统的PDF内部口令加密机制具有繁琐、认证方式单一的缺点.为了弥补这一不足,通过剖析PDF格式的结构和语法,探究Acrobat标准加密方式的机制和原理,总结出PDF文档加密的一般流程.并在此基础上提出一种新的加密机制,将解密方的本地用户信息作为参数融入到认证信息中.同时设计并实现了一个基于网络环境下的PDF数字版权系统,该系统可以在Acrobat外部对文档进行高效灵活的批量加密.更多还原

【Abstract】 Traditional internal password mechanism of PDF encryption requires inconvenient operation but rigid authentication.To make up these shortcomings,the general process of PDF encryption is concluded by analyzing the structure and syntax of this format as well as researching the principle ofPDF encryption.On this basis,a new mechanism of encryption is put forward which integrate the information of local client as parameters into the authentication.Then we design and develop a Network Environment-based PDF Digital Right Management System(DRMS).This system implements efficient and flexible batch encryption.更多还原