一种用户受限的数字指纹编码方法  

User-limited digital fingerprint code scheme

作　　者：余永升[1,2] 程金树[1] 魏志华[1] 陈晓苏[2] 

机构地区：[1]武汉理工大学绿色建筑材料与制造教育部工程研究中心,湖北武汉430070 [2]华中科技大学计算机科学与技术学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2012年第10期5-8,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划资助项目(2007AA01Z309);中央高校基本科研业务费专项资金资助项目(2012-IV-058)

摘　　要：针对用户数量受限的应用环境,给出一种以一系列小的BIBD(balanced incomplete block design)关联矩阵取补转置得到的编码矩阵,替代单位标准正交阵中的非零元素构成2层的级联码,与混沌序列异或,并根据合谋假设计算并重复码字后分配给分组用户的数字指纹方案.基于该方案,研究了分组编码的区块矩阵的大小对编码抗合谋攻击的影响,讨论了用户分组的合理性原则.实验表明:选取大小相近的内码矩阵块并设置相对均衡的用户分组,对提高指纹编码的抗合谋攻击能力和编码效率有着积极的作用.To study the applied environment with limited quantity of users, a serial small transposed matrixes of balanced incomplete block design was used in the digital fingerprint code method for limit ed users to replace the nonzero elements of unit matrix. A two-level code was built, and duplicates a few times based on the situation of collusion attacks and distributes to users was duplicated. Based on the scheme, the influence on the ability of anti-collusion attack brought from the size of block matrix was studied, and the principle of grouping users was analyzed. Research shows that it is helpful to im- prove the anti-collusion ability of the codeword and efficiency of encoding by choosing similar size block matrix and setting balanced usersr groups.

关 键 词：数据安全 图像处理 数字水印 数字指纹 泄密者追踪 分组方案 

分 类 号：TN913.73[电子电信—通信与信息系统]