【作者】 孙国军；

【导师】 闫茂德；

【作者基本信息】 长安大学 ， 交通信息工程及控制， 2008， 硕士

【摘要】 针对现有移动警务系统存在传输信息容量有限,信息共享性差,图像相关业务应用少,加解密算法速度慢,严重影响系统处理速度等缺点。论文在分析公安系统信息化建设的需求、任务、特点及建设现状的基础上,设计了基于C/S结构的公安综合移动警务系统。该系统以现代通信手段,实现公安专网的数据信息与移动终端警员对接,充分利用后台数据资源,为现场事故处理提供强大的数据支持,提高警务人员的工作效率和实战能力。论文的主要研究成果如下:1.设计了一种基于C/S结构的公安综合移动警务系统,该系统以三层C/S结构实现移动终端和公安数据中心的信息交换。2.设计了基于XML数据格式的数据编码方案,确保数据在网络中实现不同平台的对接;同时,采用JPEG压缩算法实现图像信息在无线网络上的传输。3.设计并实现了基于警员密码的AES加密方案,实现了移动警务系统文字和图像信息的加密传输。该方案实现图像压缩后的加密传输技术,弥补了一些图像加密算法无法实现图像压缩的缺点。加密方案以AES加密算法为基础,以警员密码作为密钥基,通过保密扩展函数将警员密码扩展成AES算法密钥。该算法需求存储空间小、运算速度快、带宽要求低、密钥管理方便,并且具有数字签名功能,为公安综合移动警务系统数据传输提供安全保障。4.对公安综合移动警务系统软件的各模块进行测试确保软件的正确性和稳定性。公安综合移动警务系统实现警员的移动办公和后台数据共享,达到公安部提出的查询3A要求,使民警快捷、有效地获取相关信息。因此,公安综合移动警务系统的设计与实现具有很高的实际应用价值。更多还原

【Abstract】 The traditional mobile police information system has lots of defects, such as limited capacity, poor information sharing, less relevant business applications of image, slower encryption and decryption speed. In order to solve these problems of the mobile police information system, this thesis designs a kind of public security synthesis mobile police system based on C/S structure on the basis of analyzing the requirements, tasks, characteristics and actual status of the police system informatization. The system uses modern communication to link the information of police security network and mobile data terminals, and makes full use of the background information resources and improves the working efficiency and combat capability of the police officers. The main results in the research are as follows:1. A kind of public security synthesis mobile police system based on C/S structure is developed. This system adopts the three layer C/S structure to achieve data exchange between the frontline policemen and the data centre.2. This thesis designs the coding schemes which based on XML-based to realize the connection among different network platforms .At the same time, the system uses the JPEG compression algorithm to transmit image information in the wireless network.3. The AES encryption scheme based on officers’password is proposed and realized. This scheme achieves encryption transmission of character and image information, and the programmer has compressed image date before transmission, which makes up the disadvantage of some image encryption algorithm that is without compression. The encryption scheme uses AES encryption algorithm as the basis, officer’s password as a key, the confidential expanded function will extend police officers’password into AES algorithm keys. The algorithm needs small storage space and low bandwidth, and has the advantages of high speed and convenient key-manage and digital-signature. The algorithm provides security safeguards for police information system.4. The module of the system’s software is tested in order to make sure about its correctness and stability. The public-security synthesis mobile police system realizes mobile office and the sharing of background information, reaches the 3A requirements in police Ministry. The police can achieve the relevant information as quickly as possible. Therefore, the design and implementation of this system has high practical value.更多还原