information security principles and practice

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

failure recovery mechanism for compute nodes that carry user-calculated load : compute node Local restart failure. and non-local restart classes when the fault occurs, how to maintain the continuity of business delivery without maintenance intervention and application Layer special processing . l reliability of the cloud Computing data center overall network safeguard mechanism. l cloud storage data continuous service and data anti- missing protection mechanism HDD

20145236 "Cyber Confrontation" EXP9 Web security Basic Practice one, the basic question answers: SQL injection attack principle, how to defend SQL injection: This is done by inserting a SQL command into a Web form to submit or entering a query string for a domain name or page request, eventually reaching a malicious SQL command that deceives the server. The ability to inject (malicious)

20145301 Zhao Jiaxin "Cyber Confrontation" EXP9 Web Security Fundamentals Practice Experiment Answer questions (1) SQL injection attack principle, how to defend SQL injection attack principle: SQL is an ANSI standard computer language used to access and manipulate database systems. SQL statements are used to retrieve and update data in the database. SQL injection is a technique for modifying a back

application server sends client requests to the data server, and send the data server feedback to the client. The client blocks the data server and cannot access it. This reduces the virus and illegal intrusion on the data server and protects the most important data in the hospital information system. Summary Digital hospital network security is a system engineering, and

Java has three main features: platform independence, network mobility, and security. The Java architecture provides powerful support and assurance for these three features, this article focuses on the principles and usage of the Java architecture to support information security. 　　Java Architecture Shows the architect

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

to IdeaIf it is much easier to add the JAVAP command to the compiler to view the bytecode file, here's how to add the JAVAP command to idea:(1) Open the Setting menu,(2) Find the Extension tool in the tool click Open,(3) Click the Green Plus button in the upper left corner of the left area to pop up an edit box like this, enter as prompted,(4) Click OK after completion, click on the setting window of apply and OK, to here has completed the JAVAP command to add,(5) View the added commands and ru

employee ID (curly) login, just change the value toNaturally shows the information of the first employee (Larry); 7), Database backdoors 1. Target: Use string SQL injection to execute multiple SQL statements. The first phase uses a vulnerable field to create two SQL statements. The first one is the system, the second one is entirely yours. Your account ID is 101. This page allows you to view passwords, SSN, and payroll. Try to inject an

user's permission to have the strict distinction.2, forcing the use of parameterized statements.3, strengthen the validation of user input.4. Use the security parameters that are available from the SQL Server database.5, if necessary, use professional vulnerability scanning Tool to find the point that may be attacked.What is the principle of XSS attack and how to defend it? Attack principle:For cross-site scripting attacks, XSS attacks are similar to

more secure solution. You will also need to ask all users who use the cookie to change their passwords in the future, as their verification information is exposed. Permanent login requires a permanent login cookie, often called a validation cookie, because cookies are the only standard mechanism used to provide stable data between multiple sessions. If the cookie provides permanent access, it poses a serious risk to the

20155324 "Network countermeasure Technology" Web Security Foundation Practice Experiment ContentUse Webgoat for XSS attacks, CSRF attacks, SQL injectionExperimental question and answer SQL injection attack principle, how to defendThe ①sql injection attack is an attacker who adds additional SQL statements at the end of a predefined query in a Web application, takes SQL statements as user names, and then ente

201453331 Wei Web Security Fundamentals Practice I. Experimental process 1, webgoat Open2, injection flaws practiceCommand InjectionThe original page did not inject the place, then use Burpsuite (set the relevant steps other people's blog written very detailed, not tired of), analyze the first package to see his data submitted location, found after the injection of command, success. I injected the command i

information that he gives you. (3) Use customer service. For example, you can pretend to be an email user and call customer service to say that the password is lost. I used to hear that QQ is okay. The park friends told me that Yahoo's mailbox was okay the day before yesterday. It was incredible. (4) "social engineering" allows you to obtain the information you want by approaching the target person, his fa

integrity of these three levels of the organization (Integrity). In this paper, the scope and principles of the system are described in detail, which is the basis of the management system. Key concepts: The organization is composed of three levels of systems, Fromal system,informal system,technical system; The organization uses the various controls to manage and control these three level system; The purpose of all control

In the previous blog "acegi security form-based authentication-debug debugging", we described a phenomenon that the previous page is retained every time a new browser is opened. For the previous example, either the current user information or the permission information is not available. This occurs. We have analyzed this in the previous blog, that is, there are a

directly connected REMOTE_ADDR.But the security risk is that the x_forwarded_for information is a field in the HTTP header that can be modified (forged) to any string. Suppose a business scenario is: The user's IP into the database, if first obtained the user forged IP string, injected SQL query statement, resulting in SQL Inject vulnerability.So either get remote_addr directly, or filter the http_x_forwar

browser to obtain information such as its cookie. Instead, CSRF is borrowing the user's identity to send a request to Web server because the request is not intended by the user, so it is called "cross-site request forgery". The defense of CSSRF can be carried out from a few aspects; Referer, token or verification code to detect user submissions; Try not to expose the user's privacy informat