通讯网络密文信息篡改快速恢复数学建模  

Mathematical Modeling of Fast Recovery of Encrypted Information Tampering in Communication Network

作　　者：刘淑芬 钟晓林 贺煦 刘咏梅[2] LIU Shu-fen;ZHONG Xiao-lin;HE Xu;LIU Yong-mei(Nanchang JiaoTong Institute,Nanchang Jiangxi 330100,China;Jiangxi Normal University,Nanchang Jiangxi 330022,China)

机构地区：[1]南昌交通学院,江西南昌330100 [2]江西师范大学,江西南昌330022

出　　处：《计算机仿真》2022年第4期433-436,486,共5页Computer Simulation

基　　金：江西省教育厅科学技术研究项目(GJJ209307)。

摘　　要：密文信息在通讯过程中由于信道干扰、噪声等因素影响不可避免地出现篡改现象。为实现初始信息还原处理,提出通讯网络密文信息篡改快速恢复数学建模方法。确立因素集与评语集,选取权重指标,结合隶属度矩阵,利用模糊评价模型完成通讯信道等级划分;将块差值、宏块再同步置信度与过恢复检测的相关信息作为指示数据,使用离散余弦变换系数强制性修改方式嵌入指示信息,检测篡改像素,区分平滑块与边缘块;对于平滑块采用空间域算法计算图像模糊熵与测度,同时针对边缘块,获得模糊增强算子,确定最佳阈值,完成信息篡改恢复。仿真结果表明:所提方法能够全面检测出篡改信息,并增强恢复质量,实现快速恢复。In the process of communication, the ciphertext information is disturbed by channel interference and noise, resulting in tampering. This paper presents a mathematical modeling method for the fast recovery of ciphertext information tampering in communication networks. Factor sets and comment sets were used to select weight indicators.Based on the membership matrix and fuzzy evaluation model, the level of communication channels was divided. Information related to block difference, macroblock resynchronization confidence, and over-recovery detection was applied as indication data. The discrete cosine transform coefficients were utilized to modify the embedded indication information in order to detect tampered pixels and distinguish flat sliders from edge blocks. The smooth block was calculated by image fuzzy entropy and measured through a spatial domain algorithm. Meanwhile, the fuzzy enhancement operator of the edge block was also obtained to determine the optimal threshold, achieving the information tamper recovery. The simulation results show that this method has comprehensive tampering information, enhanced recovery quality and rapid recovery.

关 键 词：通讯网络 密文信息 差错检测 篡改恢复 模糊数学理论 

分 类 号：TP318.2[自动化与计算机技术—计算机软件与理论]