工程设计数字图纸DXF格式文件的篡改检测定位方法  

Tampering Detection and Positioning Method of Engineering Design Digital Drawing DXF Format Files

作　　者：范荣全 郑晓波 曾嵘 向圣军 陈少卿 吕俊杰 FAN Rongquan;ZHENG Xiaobo;ZENG Rong;XIANG Shengjun;CHEN Shaoqing;L Junjie(State Grid Sichuan Electric Power Company,Chengdu 610000,China;State Grid Sichuan Electric Power Company Tianfu New Area Power Supply Company,Chengdu 610000,China;Chengdu Rongyao Technology Co.,Ltd.,Chengdu 610000,China)

机构地区：[1]国网四川省电力公司,四川成都610000 [2]国网四川省电力公司天府新区供电公司,四川成都610000 [3]成都荣耀科技有限公司,四川成都610000

出　　处：《微型电脑应用》2023年第10期64-67,共4页Microcomputer Applications

基　　金：国网四川省电力公司依托工程基建实用新技术研究项目(GWSCJJ-XJS-2020-01)。

摘　　要：传统设计文件的不可篡改都是靠纸板蓝图保证,但随着信息化的发展,强烈需要一种能高效检测定位电子版设计文件是否发生篡改和定位篡改位置的技术。将多元素DXF格式设计文件分解,按元素提取最重要的层、块、实体元素和实体数量,构成设计文件的特征。将提取的特征作为底层叶子,利用基于MD5算法的默克尔树得到防篡改码。通过对比防篡改码可以检测是否发生篡改和定位篡改位置。理论分析和实验表明,本方法可以检测文件是否篡改并进行定位。对1 MB设计文件生成防篡改码仅需2 s,满足实践需要。The immutability of traditional design files is guaranteed by cardboard blueprints,but with the development of informatization,there is a strong need for a technology that can efficiently detect and locate electronic design files for tampering and locate the tampered position.The multi-element DXF format design file is decomposed,and the most important layers,blocks,entity elements and the number of entities are extracted to form the features of the design file;the extracted features are used as the bottom leaves,and the Merkle tree based on MD5 algorithm is used to obtain tamper-proof code.By comparing the tamper-resistant code,it is possible to detect whether tampering has occurred and locate the tampering location.Theoretical analysis and experiments show that this method can detect whether the file is tampered and locate it.It only takes 2 seconds to generate a tamper-proof code for a 1 MB design file,which meets practical needs.

关 键 词：设计文件 MD5算法 数字图纸 篡改检测定位 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]