• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2003.10a
• /
• pp.203-206
• /
• 2003

네트워크 상에서 송수신되는 데이터를 외부의 침입으로부터 보호하는 것은 매우 중요하며, 그 중 데이터의 무결성을 검증하고 보장하기 위한 방법으로 SSL(Secure Socket Layer)을 사용한다. 본 논문에서는 클라이언트와 서버간에 송수신되는 데이터의 무결성이 위배되었을 경우 그 정보를 검증 및 관리할 수 있도록 OpenSSL을 이용한 무결성 위배 데이터 검증 및 관리 시스템을 구성하고, 검증된 데이터를 IDS(Intrusion Detection System)로 전송하여 침입 탐지 정보와 무결성 검증 정보를 통합적으로 관리할 수 있는 IDS 통합 시스템을 제안 및 설계하였다.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.28 no.1
• /
• pp.145-153
• /
• 2018

SSL (Secure Socket Layer) and TLS (Transport Layer Security) are widely used protocols for secure and encrypted communication over a computer network. However, there have been reported several security vulnerabilities of SSL/TLS over the years. The vulnerabilities can let an adversary carry out critical attacks on SSL/TLS enabled servers. In this paper, we have developed a system which can periodically scan SSL/TLS vulnerabilities on internal network servers and quickly detects, reports and visualizes the vulnerabilities. We have evaluated the system on working servers of Naver services and analyzed detected vulnerabilities. 816 vulnerabilities are found on 213 internal server domains (4.2 vulnerabilities on average) and most vulnerable servers are not opened to public. However, 46 server domains have old vulnerabilites which were found 2016. We could patch and response to SSL/TLS vulnerabilites of servers by leveraging the proposed system.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.14 no.8
• /
• pp.1855-1860
• /
• 2010

This paper describes construction of web services system for secure message transmission appling web services standards. This system composes single sign on module, SSL module and secure message module. We applied these modules to price comparison site. Single sign on module used SAML standards. This module was designed, in order to provide authentication and authorization. As SSL module processes message encryption among end to end, messages of this system are secure. Secure message module is designed according to WS-Security standards and processes authentication, XML signature and XML encryption.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.27 no.3
• /
• pp.459-466
• /
• 2017

One of the most widely-used open source project; OpenSSL is a cryptography library that is used to secure most web sites, servers and clients. One can secure the communication with the Secure Socket Layer (SSL) or its successor, Transport Layer Security (TLS) protocols by using the OpenSSL library. Since cryptography protocols will be updated and enhanced in order to keep the system protected, the library was written in such a way that simplifies the integration of new cryptographic methods, especially for the symmetric cryptography protocols. However, it gets a lot more complicated in adding an asymmetric cryptography protocol and no guide can be found for the integration of the asymmetric cryptography protocol. In this paper, we explained the architecture of the OpenSSL library and provide a simple tutorial to modify the OpenSSL library in order to accommodate custom protocols of both symmetric and asymmetric cryptography.

• Journal of the Korea Computer Industry Society
• /
• v.5 no.1
• /
• pp.49-56
• /
• 2004

With the growing usage of the networks, the users in the Internet uses some kinds of web server. They confused that each web server uses the different user ID and passwords. To solve these problems, SSO (Single Sign-On) solution is introduced. We presents the modeling methods which are efficiently constructed the network management models. We constructed the intrusion detection systems and firewalls using the SSO. This architecture is efficient to manage the network usage and control. SSO solution designed on the small scale Intranet. CA server in the 550 that depends on PKI (Public Key Infrastructure) is used to issue the certificates. SHTTP based on SSL (Secure Socket Layer) is used to protect the data between certificate server and the intranet users.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.26 no.3
• /
• pp.563-572
• /
• 2016

Recently, a plenty of credit card payment protocols have been proposed in Korea. Several features of proposed protocols include: using passwords for user authentication in stead of official certificate for authenticity, and no need to download additional security module via ActiveX into user's devices. In this paper, we suggest two new credit card payment protocols that use both SSL(Security Socket Layer) as a standardized secure transaction protocol and password authentication to perform online shopping and payment. The first one is for the case where online shopping mall is different from PG(Payment Gateway) and can be compared to PayPal-based payment methods, and the second one is for the case where online shopping mall is the same as PG and thus can be compared to Amazon-like methods. Two proposed protocols do not require users to perform any pre-registration process which is separate from an underlying shopping process, instead users can perform both shopping and payment into a single process in a convenient way. Also, users are asked to input a distinct payment password, which increases the level of security in the payment protocols. We believe that two proposed protocols can help readers to better understand the recent payment protocols that are suggested by various vendors, and to analyze the security of their payment protocols.

• Proceedings of the Safety Management and Science Conference
• /
• 1999.11a
• /
• pp.441-456
• /
• 1999

월드 와이드 웹(WWW)의 발달로 인터넷을 기반으로 하는 전자상거래(Electronic Commerce) 이용 등 전세계적으로 네트워크의 사용이 늘어나게 되었고, 더불어 네트워크에 대한 보안과 암호화의 문제가 이슈로 떠오르고 있다. 하지만 신뢰감 부족으로 인하여 인터넷을 통한 제품 구매를 선호하지 않는다. 따라서 본 논문에서는 이러한 문제점을 개선하기 위해 웹서버와 클라이언트사이에 SSL(Secure Socket Layer)을 사용하는 전자상거래 시스템을 구현하여 보았다. 이것은 전자화폐의 지불과정이나, 거래자의 인증과정에 앞서서 수행되므로, 아직 보안상 불완전한 거래에 사용자들로 하여금 신뢰를 줄 수 있다.

• Journal of Fisheries and Marine Sciences Education
• /
• v.28 no.3
• /
• pp.790-798
• /
• 2016

Currently, web-based online games is becoming popular in supporting learning process due to their effective and efficient tool. However, online games have lack of security aspect, in particular due to increase in the number of personal information leakage. Since the data are transmitted over insecure channel, it will be vulnerable of being intercepted by attackers who want to exploit user's identity. This paper aims to propose an online web-based educational game, Vidyanusa which allows the students to register their personal information using a unique code, a user name and a password. It manages the users according to their schools, subject teachers and class levels. In addition, by adopting a unique code, the confidentiality of the user identity can be kept away from attackers. Moreover, in order to provide a secure data communication between client and server, Secure Socket Layer (SSL) protocol is adopted. The performance of the system after implementing SSL protocol is examined by loading a number of requests for various users. From the experiment result, it can be concluded that the SSL protocol can be applied to web-based educational system in order to offer security services and reliable connection.

• Proceedings of the Korean Information Science Society Conference
• /
• 2003.10a
• /
• pp.841-843
• /
• 2003

DRM(Digital Rights Management)은 디지털 컨텐츠의 저작권자 권리를 보호하고 인터넷상에서 안전한 거래를 보장하는 기술이다. DRM 기술에 있어서 암호 및 인증을 위한 서버 및 클라이언트 설계는 중요한 부분을 차지하여 SSL(Secure Socket Layer)은 늪은 안정성으로 인하여 네트워크 통신을 위한 프로토콜로 가장 많이 사용되고 있다. 본 논문에서는 DRM 유통 시스템에서 인증서를 기반으로 하는 SSL 보안 통신 메커니즘을 제안하고, 이를 기반으로 한 암호 및 인증 서버/클라이언트의 설계 및 구현에 관하여 기술한다. 본 논문에서 제안된 SSL보안 통신 메커니즘은 MS CryptoAPI를 사용하여 구현하였고, 인증서 기반의 보안이 필요한 다른 응용 프로그램 (Messenger. ftp)에도 쉽게 주용 시킬 수 있는 특징을 가진다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2002.11a
• /
• pp.489-492
• /
• 2002

인터넷 전자 상거래의 폭발적 증가와 더불어 개인 및 기업의 정보가 온라인 상으로 유출되는 경우가 증가하고 있다. 이에 따라. 새로운 하드웨어의 추가 없이 프로토콜 및 알고리즘의 변화에 유연한 인터넷 보안방법이 요구되고 있다. 본 논문에서는 사용자 영역과 상관없는 커널 스레드를 사용하고 커널 영역으로 포팅된 라이브러리를 참조하여 사용자의 웹 페이지 요청을 처리함으로써 응답시간과 서버 부하를 감소시키는 새로운 SSL(Secure Socket Layer) 처리 구조를 제안한다.