• Proceedings of the IEEK Conference
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• 2004.08c
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• pp.540-543
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• 2004

Address Resolution Protocol (ARP) cache poisoning is a MAC layer attack that can only be carried out when an attacker is connected to the same local network as the target machines. ARP is not a new problem, but wireless network introduces a new attack point and more vulnerable to the attack. The attack on wireless network cannot be detected by current detection tool installed on wired network. In order to detect the ARP poisoning attack, there must be a ARP poisoning detection tool for wireless LAN environment. This paper proposes linux-based ARP poisoning detection system equipped with wireless LAN card and Host AP device driver

• Proceedings of the IEEK Conference
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• 2002.07a
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• pp.317-320
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• 2002

In this paper, we will present the design and implementation of the KASUMI crypto algorithm and confidentiality algorithm (f8) to an hardware chip for 3GPP system. The f8 algorithm is based on the KASUMI which is a block cipher that produces a 64-bit output from a 64-bit input under the control of a 128-bit key. Various architectures (low hardware complexity version and high performance version) of the KASUMI are made with a Xilinx FPGA and the characteristics such as hardware complexity and thor performance are analyzed.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2006.06a
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• pp.784-787
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• 2006

본 논문에서는 유비쿼터스 헬스케어 서비스의 개념에 대해 간략히 소개하고 서비스를 구성하는 요소에 대해 살펴본다. 또한 유비쿼터스 헬스케어 서비스의 다양한 영역 중 Hospital Information System(HIS) 기반의 헬스케어 서비스를 위한 시스템 기술의 현황과 보안상 문제점을 살펴본다. 특히, 프라이버시 및 데이터 보호와 관련된 보안 이슈를 중점적으로 고려하여 안전한 유비쿼터스 헬스케어 서비스를 보장하기 위해 지원 가능한 기술적 방안들에 대해 기술한다.

• Annual Conference of KIPS
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• 2001.10b
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• pp.953-956
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• 2001

인터넷에서 정보보호 서비스를 제공하는 시스템은 일반적인 시스템보다 보안성 유지의 필요성이 더욱 중요하다. 그렇기 때문에 시스템의 안전성, 즉 시스템의 구현상의 적합성과 보안성을 평가하는 기술이 필요하다. 특히 고도로 발전하는 해킹기술에 대해 시스템이 얼마만큼의 정보보호 서비스를 제공하는지에 대해 평가할 수 있어야 그 시스템의 적합성과 보안성을 확인할 수 있다. 이러한 보안성 평가 기술은 정보보호 서비스를 제공하는 시스템에 독립적으로 구동 되어야 하고, 고도로 발전하는 해킹기술에 대해 유연히 대처할 수 있어야 한다. 본 논문에서는 프로토콜 레벨의 정보보호 서비스를 제공하는 시스템에 대해 다양한 규칙을 적용하여 시스템의 적합성 및 보안성을 객관적으로 평가할 수 있는 규칙기반 프로토콜 보안평가 시스템을 설계한다.

• Journal of Korea Multimedia Society
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• v.20 no.2
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• pp.279-288
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• 2017

Nowadays, nations cyber security capabilities play an important role in a nation's defense. Security-critical infrastructures such as national defenses, public services, and financial services are now exposed to Advanced Persistent Threats (APT) and their resistance to such attacks effects the nations stability. Currently Cyber Threat Intelligence (CTI) is widely used by organizations to mitigate and deter APT for its ability to proactively protect their assets by using evidence-based knowledge. The evidence-based knowledge information can be exchanged among organizations and used by the receiving party to strengthen their cyber security management. This paper will discuss on the business process reengineering of the CTI information exchange management for a nationwide scaled control and governance by the government to better protect their national information security assets.

• Annual Conference of KIPS
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• 2012.04a
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• pp.759-760
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• 2012

국내 주식거래 시장에서 사용되는 홈트레이딩시스템(HTS)은 PC와 인터넷만 연결되어있으면 누구나 쉽게 내려받아 이용할 수 있는 주식거래 프로그램이다. 집에서도 이용할 수 있는 장점 때문에 증권회사별로 HTS를 만들어 배포하고 있으며 사용자의 편의성과 효용성을 만족하게 하려고 다양한 HTS를 개발하고 있다. 하지만 사용자 편의성에 중심을 두다 보니 아직 보안에 대해 미흡한 점이 발견되고 있고 이러한 취약점에 대해 보완을 하고 있다. 따라서 본 논문에서는 아직 보완해야 할 부분이 많은 메모리 영역에서의 보안취약점에 대해서 알아보고 이를 막으려는 대응방법을 제시한다.

• Annual Conference of KIPS
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• 2008.11a
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• pp.1533-1536
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• 2008

악성 봇이 현대 인터넷 보안의 큰 위협으로 등장함에 따라, 이러한 봇을 탐지하기 위한 많은 연구가 진행되고 있다. 하지만 악성 봇은 꾸준히 진화하여 탐지방법을 무력화시키고 있으며, 최근 HTTP를 이용한 악성 봇의 등장으로 그 탐지와 대응이 더욱 어려워지고 있다. 게다가 웹기반 서비스들의 증가로 HTTP를 이용하는 패킷은 통신량의 대부분을 차지하고 있으며, 이들에 대한 분석은 큰 부하를 발생시키게 된다. 이러한 문제를 해결하기 위해서는 악성 봇넷을 효과적으로 탐지하기 위한 효율적인 매져들을 선택하여야 하며, 본 논문에서는 대표적인 HTTP 기반 악성 봇넷인 크라켄(Kraken) 봇넷의 특성을 분석하였다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.20 no.6
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• pp.67-81
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• 2010

As wide propagation of smartphones, e-commerce with smartphones increases rapidly. Such as transfer or stock trade systems. It has prospect that most of financial companies going to offer e-commerce systems via smartphones. And e-commerce via smartphones will be increased, hence the nature of smartphone that can be used whenever, wherever. However, legislation of e-commerce in Korea does not reflect these characteristics of smartphones, because it has set standards in regular PC. So that this study is security threat and feature of smartphones considering that the current legal system will use Certificate constraints, ensuring the safety of e-commerce and install security programs for protection of users, e-commerce responsible for the accident analysis has focused on the issues presented for this improvement.

• Journal of Korea Society of Digital Industry and Information Management
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• v.13 no.1
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• pp.87-101
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• 2017

As people increasingly rely on mobile networks in modern society, mobile communication security is becoming more and more important. In the Long Term Evolution/System Architecture Evolution (LTE/SAE) architecture, the 3rd Generation Partnership (3GPP) team has also developed the improved Evolved Packet System Authentication and Key Agreement (EPS AKA) protocol based on the 3rd Generation Authentication and Key Agreement (3G AKA) protocol in order to provide mutual authentication and secure communication between the user and the network. Unfortunately, the EPS AKA also has several vulnerabilities such as sending the International Mobile Subscriber Identity (IMSI) in plain text (which leads to disclosure of user identity and further causes location and tracing of the user, Mobility Management Entity (MME) attack), man-in-middle attack, etc. Hence, in this paper, we analyze the EPS AKA protocol and point out its deficiencies and then propose an Efficient and Security Enhanced Authentication and Key agreement (ESE-EPS AKA) protocol based on hybrid of Dynamic Pseudonym Mechanism (DPM) and Public Key Infrastructure (PKI) retaining the original framework and the infrastructure of the LTE network. Then, our evaluation proves that the proposed new ESE-EPS AKA protocol is relatively more efficient, secure and satisfies some of the security requirements such as confidentiality, integrity and authentication.

• Journal of Internet Computing and Services
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• v.9 no.3
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• pp.43-50
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• 2008

Authenticated Encryption scheme in RFID system is the important issue for ID security. But, implementing authenticated Encryption scheme in RFID systems is not an easy proposition and systems are often delivered for reasons of complexity, limited resources, or implementation, fail to deliver required levels of security. RFID system is so frequently limited by memory, performance (or required number of gates) and by power drain, that lower levels of security are installed than required to protect the information. In this paper, we design a new authenticated encryption scheme based on the EC(Elliptic Curve)'s x-coordinates and scalar operation. Our scheme will be offers enhanced security feature in RFID system with respect to user privacy against illegal attack allowing a ECC point addition and doubling operation.