• Convergence Security Journal
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• v.10 no.4
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• pp.31-37
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• 2010

The risks and threats in IT security systems to protect, prevent damage and Risk should be minimized. Context of information security products such as information processing, storage, delivery, and in the process of information system security standards, That is the basic confidentiality, availability, integrity and secondary clarity, potential evidence, detection, warning and defense capabilities, to ensure sufficient and should be. Web services are the most important elements in the security, the web nature of port 80 for the service to keep the door open as a structure, Web applications, web sources and servers, networks, and to hold all the elements are fundamental weaknesses. Accordingly, these elements through a set of Web application development errors and set-up errors and vulnerabilities in Web applications using their own home pages and web servers to prevent hacking and to improve the efficiency of Web services is proposed methodology performs security BMT.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10a
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• pp.877-879
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• 2003

인터넷의 급속한 보급으로 인하여 많은 웹 서버들이 생겨나게 되었다. 이러한 웹 서버의 관리와 운영에 모니터링 시스템이 많이 쓰이고 있다. 대부분의 모니터링 시스템들은 각 서버의 자원 활용 상태나 서비스의 가용성에 대한 정보를 제공하고 있지만 웹 서버의 또 다른 문제인 해킹에 대한 정보는 제공되지 않고 있다. 이것은 해킹에 대한 예방이 기존의 보안 솔루션으로 가능했기 때문인데, 요즘 화두가 되고 있는 웹 해킹에 대해서는 기존의 보안 솔루션으로 예방이 어려워지고 있다. 이러한 문제점을 해결하기 위해 본 논문에서는 웹 애플리케이션의 취약성에 대해 알려주고 웹 해킹 시도로 의심되는 행위에 대한 로그를 제공해 주는 모니터링 시스템을 구현한다. 구체적으로 웹 애플리케이션 언어들 중에서 많이 쓰이는 PHP에 대한 웹 해킹 취약성에 대하여 조사하여 웹 애플리케이션의 취약성 정보를 제공해 주고 웹 해킹 의심로그를 생성해 주는 시스템을 구현한다. 구현된 시스템은 관리되는 서버의 웹 애플리케이션의 취약성을 알 수 있고 웹 해킹 시도로 의심되는 로그를 남겨줌으로써 웹 서버 관리자에게 웹 해킹에 대한 보안성 향상에 필요한 정보를 제공해주는 이점이 있다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.01a
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• pp.361-363
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• 2019

인터넷환경에서 금융회사는 홈페이지 사용자의 신원확인, 부인방지 등의 목적으로 공개키 기반구조(PKI: Public Key Infrastructure) 환경의 공인인증서를 홈페이지 로그인, 전자금융거래 등의 업무에 적용하고 있다. 사용자의 공인인증서를 이용하여 생성된 전자서명이 악성코드 감염 등으로 인하여 유출 시 사용자가 과거에 서명했던 전자서명이 재사용(로그인, 전자금융거래 등)될 수 있는 취약점이 존재하기에 인터넷 상에서의 전자서명 재사용에 대한 원인, 방지 절차 및 방법을 제안 하고자 한다.

• International Journal of Computer Science & Network Security
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• v.22 no.1
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• pp.234-240
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• 2022

One of the most discussed topics is cyber security when it comes to web application and how to protect it and protect databases. One of the most widely used and widespread techniques is SQLI, and it is used by hackers and hackers. In this research, we touched on the concept of SQLI and what are its different types, and then we detected a SQLI vulnerability in a website using SQLMAP. Finally, we mentioned different ways to avoid and protect against SQLI.

• The KIPS Transactions:PartA
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• v.15A no.3
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• pp.181-188
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• 2008

Nowadays, most web sites are developed using dynamic web pages where web pages are generated and transmitted by web application programs. Therefore, the ratio of attacks injecting malevolent strings to vulnerable web applications is increasing. In this paper, we present a static program analyzer which analyzes whether a web application program has vulnerabilities to the SQL injection attack and the cross site scripting(XSS) attack. To analyze programs using abstract interpretation framework, we designed an abstract domain which models potential string set along with excluded strings and developed an abstract interpreter for the PHP language. Also, based on them, we implemented a static analyzer. According to our experiments, our analyzer has competitive analysis speed and accuracy compared with related research results.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.24 no.3
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• pp.535-545
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• 2014

As the software industry has developed, the attacks making use of software vulnerability has become a big issue in society. In particular, because the attacks using the vulnerability of web browsers bypass Windows protection mechanism, web browsers can readily be attacked. To protect web browsers against security threat, research on fuzzing has constantly been conducted. However, most existing web browser fuzzing tools use a simple fuzzing technique which randomly mutates DOM tree. Therefore, this paper analyzed existing web browser fuzzing tools and the patterns of their already-known vulnerability to propose an event and command based fuzzing tool which can detect the latest web browser vulnerability more effectively. Three kinds of existing fuzzing tools were compared with the proposed tool. As a result, it was found that the event and command based fuzzing tool proposed was more effective.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.42 no.4
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• pp.838-847
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• 2017

CNG which was released as a substitute of the previous CAPI (Cryptography API) library from Microsoft is constructed with individual modules based on the plug-in architecture, this means CNG is exceedingly helpful in the cost of development as well as the facility of extension. On the opposite side of these advantages, considerations on security issues are quite insufficient. Therefore, a research on security assurance is strongly required in the environment of distributing and utilizing the CNG library, hence, we analyze possible security vulnerabilities on the CNG library. Based on analyzed vulnerabilities, proof-of-concept tools are implemented and vulnerabilities are verified using them. Verified results are that contents of mail, account information of mail server, and authentication information of web-sites such as Amazon, E-bay, Google, and Facebook are exposed in Outlook program and Internet Explorer program using CNG library. We consider that the analyzed result in this paper can improve the security for various applications using CNG library.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.749-751
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• 2016

Internet technology is universal, news from the Web browser, shopping, search, etc., various activities have been carried out. Its size becomes large, increasing the scale of information security incidents, as damage to this increases the safety for the use of the Internet is emphasized. IE browser is ASLR, such as Isolated Heap, but has been continually patch a number of vulnerabilities, such as various protection measures, this vulnerability, have come up constantly. And, therefore, in order to prevent security incidents, it is necessary to be removed to find before that is used to exploit this vulnerability. Therefore, in this paper, we introduce the purge is a technique that is used in the discovery of the vulnerability, we describe the automation technology related thereto. And utilizing the known vulnerabilities, and try to show any of the typical procedures for the analysis of the vulnerability.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.28 no.5
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• pp.1179-1195
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• 2018

Recently, a variety of attacks on web services have been occurring through a multiple access environment such as PC, tablet, and smartphone. These attacks are causing various subsequent damages such as online fraud transactions, takeovers and theft of accounts, fraudulent logins, and information leakage through web service vulnerabilities. Creating a new fake account for Fraud attacks, hijacking accounts, and bypassing IP while using other usernames or email addresses is a relatively easy attack method, but it is not easy to detect and block these attacks. In this paper, we have studied a method to detect online fraud transaction and obsession by identifying and managing devices accessing web service using web-based device fingerprinting. In particular, it has been proposed to identify devices and to manage them by scoring process. In order to secure the validity of the proposed scheme, we analyzed the application cases and proved that they can effectively defend against various attacks because they actively cope with online fraud and obtain visibility of user accounts.

• Convergence Security Journal
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• v.14 no.4
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• pp.27-32
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• 2014

Utilization of web application has been widely spread and complication in recent years by the rapid development of network technologies and changes in the computing environment. The attack being target of this is increasing and the means is diverse and intelligent while these web applications are using to a lot of important services. In this paper, we proposed security model using virtualization technology to prevent attacks using vulnerabilities of web application. The request information for query in a database server also can be recognized by conveying to the virtual web server after ID is given to created session by the client request and the type of the query is analyzed in this request. VM-Master module is constructed in order to monitor traffic between the virtual web servers and prevent the waste of resources of Host OS. The performance of attack detection and resource utilization of the proposed method is experimentally confirmed.