發(fā)布時(shí)間：2018-03-05 06:52

  本文選題：內(nèi)容審計(jì)　切入點(diǎn)：協(xié)議分析　出處：《西安建筑科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著互聯(lián)網(wǎng)的發(fā)展，越來(lái)越多的公司加入到互聯(lián)網(wǎng)之中。網(wǎng)絡(luò)技術(shù)的廣泛應(yīng)用，給人們的通信交流帶來(lái)了很大的方便，但是與此同時(shí)也導(dǎo)致了新的網(wǎng)絡(luò)安全問(wèn)題：個(gè)人隱私、企業(yè)的商業(yè)機(jī)密可能隨時(shí)通過(guò)網(wǎng)絡(luò)泄露，謠言、黃色信息在網(wǎng)上泛濫卻難以得到有效根治。解決涉及網(wǎng)絡(luò)的泄密以及違法信息的傳播有很多方法，從事后審計(jì)追責(zé)的方面來(lái)看，我們需要一種能夠自動(dòng)過(guò)濾網(wǎng)上內(nèi)容的監(jiān)控系統(tǒng)，，以便于能夠及時(shí)發(fā)現(xiàn)問(wèn)題并對(duì)責(zé)任者進(jìn)行定位，進(jìn)行責(zé)任追究。 本文設(shè)計(jì)了一個(gè)基于旁路接入的網(wǎng)絡(luò)內(nèi)容審計(jì)系統(tǒng)，目的就是為了解決上述問(wèn)題，能夠?qū)M(jìn)出網(wǎng)絡(luò)的郵件以及其中的附件進(jìn)行完整的捕獲、還原、存儲(chǔ)，從而到達(dá)內(nèi)容審計(jì)的作用。 本文首先分析了網(wǎng)絡(luò)內(nèi)容審計(jì)系統(tǒng)可能需要采用的不同技術(shù)，接著明確了基于旁路接入技術(shù)的網(wǎng)絡(luò)內(nèi)容審計(jì)系統(tǒng)的功能定位和系統(tǒng)的核心流程。在此基礎(chǔ)上，分析了系統(tǒng)的總體架構(gòu)，并且詳細(xì)描述了各個(gè)系統(tǒng)模塊的設(shè)計(jì)原理與架構(gòu)。 其次字符串匹配是網(wǎng)絡(luò)內(nèi)容審計(jì)中關(guān)鍵技術(shù)之一，匹配的速度直接影響到網(wǎng)絡(luò)內(nèi)容審計(jì)系統(tǒng)的工作性能。本文在分析傳統(tǒng)的Sunday算法的基礎(chǔ)上，提出了一種改進(jìn)的字符串匹配算法—Sunday2。該算法是用主串后兩個(gè)字符來(lái)遍歷模式串，確定模式串下一次右移的距離，并且在匹配過(guò)程中，優(yōu)先匹配模式串中低出現(xiàn)概率的字符，以減少匹配次數(shù)。 最后，本文對(duì)系統(tǒng)進(jìn)行了測(cè)試，各項(xiàng)功能和性能基本上達(dá)到了研發(fā)的預(yù)期目標(biāo)。通過(guò)對(duì)測(cè)試結(jié)果的分析，總結(jié)了系統(tǒng)的優(yōu)點(diǎn)和不足。指出了網(wǎng)絡(luò)內(nèi)容審計(jì)系統(tǒng)的下一步研發(fā)思路和方向。
[Abstract]:With the development of the Internet, more and more companies join in the Internet. The wide application of network technology brings great convenience to people's communication and communication, but at the same time, it also leads to a new network security problem: personal privacy. Business secrets of an enterprise may be leaked through the Internet at any time, rumors and pornographic information are flooding on the Internet but it is difficult to effectively cure them. There are many ways to solve the problem of leakage involving the Internet and the dissemination of illegal information. From the aspect of audit and accountability afterwards, We need a kind of monitoring system which can automatically filter the online content, so that we can find out the problem in time, locate the responsible person and investigate the responsibility. A network content audit system based on bypass access is designed in this paper. The purpose of this system is to solve the above problems and to capture, restore and store the incoming and outgoing mail and its attachments. In order to achieve the role of content audit. This paper first analyzes the different technologies that may be used in the network content audit system, then clarifies the function orientation and the core process of the network content audit system based on bypass access technology. The overall architecture of the system is analyzed, and the design principle and architecture of each system module are described in detail. Secondly, string matching is one of the key technologies in network content audit, and the speed of matching directly affects the performance of network content audit system. An improved string matching algorithm named Sunday2 is proposed. The algorithm traverses the pattern string with the following two characters of the main string, determines the distance of the next right shift of the pattern string, and in the course of matching, preferentially matches the characters with low probability of occurrence in the pattern string. To reduce the number of matches. Finally, the system is tested in this paper. The function and performance of the system basically reach the expected goal of the research and development. Through the analysis of the test results, This paper summarizes the advantages and disadvantages of the system, and points out the thought and direction of the next research and development of the network content audit system.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP393.08

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