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software or use the network sniffing function of Trojan horse to sniff and analyze the data transmitted in the target host. 3. Prevention of network sniffingNetwork sniffing tools often steal sensitive information by acquiring plaintext data from a packet. Therefore, we can use the hardware and software with encryption function to encrypt the data transmitted by the network, in order to achieve the security of protecting the transmitted data. VPN, SS

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Do you know the world of children's Internet? With the popularity of Weibo and other instant messaging software, children's online dating tools are more diverse, and while communication and messaging are facilitated, the higher the privacy of the internet world, the more difficult it is for parents to manage their children's online dating world. In the absence of parents ' knowledge, children's network security lurks multiple crises, through social, c

more intuitive experience the vulnerability of the web. Of course, in addition to understanding all kinds of basic attack means, but also warns us that the site design is not easy, we have learned that the site design is really fur in the fur, not only functional, beautiful and other visual problems. How to avoid the vulnerability that can be exploited in the design process, how to find and rewrite is a problem worth pondering. Can only lament the school curriculum really just take us to ge

20145225 Tang "Cyber confrontation" Web Security Basics Practice Reference Blog: 20145215 Luchomin basic question Answer(1) SQL injection attack principle, how to defend? A SQL injection attack is the goal of tricking a server into executing a malicious SQL command by inserting a SQL command into a Web form to submit or entering a query string for a domain name or page request. Defense: Use inp

20155232 "Cyber Confrontation" EXP9 Web Security FoundationThe objective of this practice is to understand the basic principles of commonly used network attack techniques. Webgoat the experiment in practice.Experimental process WebgoatWebgoat is a web-based vulnerability experiment developed by the OWASP organization, which contains a variety of vulnerabilities commonly found in the web, such as cross-site

20145326 Cai "Cyber confrontation"--web Security Fundamentals Practice 1. Answer questions after the experiment(1) SQL injection attack principle, how to defend.Principle: The SQL injection attack refers to the introduction of a special input as a parameter to the Web application, which is mostly a combination of SQL syntax, the execution of SQL statements to perform the actions of the attacker, th

20155208 Xu Zihan "Cyber Confrontation" EXP9 Web Security Basic experiment requirementsThe objective of this practice is to understand the basic principles of commonly used network attack techniques. Webgoat the experiment in practice.Experimental processFor the last time, I did not choose to try the program for the last time I did this exciting activity.WebGoatWebgoat is a web-based vulnerability experimen

20155227 "Cyber Confrontation" EXP9 Web Security Foundation Practice Experiment Content About Webgoat Cross-site Scripting (XSS) Exercise Injection flaws Practice CSRF attack Basic question Answer SQL injection attack principle, how to defend? 原理：SQL注入攻击指的是通过构建特殊的输入作为参数传入Web应用程序，而这些输入大都是SQL语法里的一些组合，通过执行SQL语句进而执行攻击者所要的操作，使非法数据侵入系统。防御：1.对用户的输入进行校验，可以通过正则表达式，双"-"进行转换等。2.

Testing the user field 13. To return normally, the User field is the field in the DVWA database table users. Go on with this one test. Finally, we get all the fields of the table users in database Dvwa, User_id,first_name,last_name,user,password,avatar,last_login,failed_login. 14. All fields of the table users in the database Dvwa are known. You can now download the data from the table. Enter 1 ' Union Select 1,group_concat (user_id, first_name, last

]?:/ /[\\w-]+\\. "); Buff.append (domain); Buff.append ("(\\/.*)? $)"); } buff.append ("| ( ^(?! HTTP). +$) "); White_domain_pattern = Pattern.compile (buff.tostring (), pattern.case_insensitive);}Five. File Upload preventionRiskThe server is under hacker controlPrincipleThe attacker can control the server by uploading an executable script via an attachment upload vulnerability.Prevention Verify file extension, only allow upload of file types in whitelist (both front and b