• Convergence Security Journal
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• v.13 no.4
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• pp.41-46
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• 2013

Routing protocol using in the existing wire network cannot be used as it is for efficient data transmission in MANET. Because it consists of only mobile nodes, network topology is changing dynamically. Therefore, each mobile node must perform router functions. Variety of routing attack like DoS in MANET is present owing to these characteristic. In this paper, we proposed cooperative-based detection method to improve detection performance of flooding attack which paralyzes network by consuming resource. Accurate attack detection is done as per calculated adaptively threshold value considered the amount of all network traffic and the number of nodes. All the mobile nodes used a table called NHT to perform collaborative detection and apply cluster structure to the center surveillance of traffic.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.43 no.7 s.349
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• pp.84-92
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• 2006

To defeat abnormal traffic driven by DoS (Denial-of-Service) or DDoS (Distributed DoS), there has been a variety of researches or studies in a few decades. In this paper, we present the results of theoretical performance analysis between attack prevention schemes and attack mitigation schemes. The former is a scheme that prevents abnormal incoming traffic from forwarding into a specific network based on filtering rules, and the latter is a scheme that makes some perimeter or intermediate routers, which exist on the traffic forwarding path, prevent abnormal traffic based on their own abnormal traffic information, or that mitigates abnormal traffic by using quality-of-service mechanisms at the gateway of the target network. The aspects of theoretical performance analysis are defined as the transit rates of either normal traffic or false-positive traffic after an attack detection routine processes its job, and we also present the concrete network bandwidth rates to control incoming traffic.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.4
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• pp.729-735
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• 2013

The recent issue of distributed denial of service attack paralyze major government and financial institution in internet sites. They threatened to the cyber security. There hasn't been easy defense of now using attack. There seems to be increases in damage. In this paper, The recent continue to evolve of distributed denial of service attack. DNS target of distributed denial of service attack give specific examples. but, DNS target of DDoS attacks about defense is insufficient. The DNS Cyber-shelter system was created based on the Cyber-shelter system for DDoS attack in Kisa.. We proposal DNS Cyber-shelter system.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.1571-1574
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• 2008

서비스 거부 공격은 현재의 서비스를 불법적으로 중단시켜 여러 사용자의 접근을 제한하는 공격 방법이다. 이러한 서비스 거부 공격 탐지 기법에 관한 연구가 활발히 진행되어 왔지만 기존의 네트워크 기반의 공격 탐지 기법은 많은 문제점을 낳고 있다. 따라서 본 논문에서는 기존의 탐지기법의 취약점을 보완하기 위해 호스트기반의 데이터를 이용해 더 효과적으로 서비스 거부 공격을 탐지할 수 있는 방법을 제안한다.

• Journal of Korea Society of Industrial Information Systems
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• v.12 no.2
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• pp.30-36
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• 2007

The UPnP uses the same standard protocol as SSDP and UDP based on standard internet and technology like the TCP/IP, and is independent of other physical networking product. But the structure of the UPnP has the of vulnerability to the security countermeasure for home-networking technology since it is operated on the same protocol as the SSDP and UDP. In this paper, we analyze and report against the DoS attack, where the worm virus, using the vulnerability to the UPnP, eliminates the attack of all equipments that are based on networking and eliminates the information belonging to the equipments of the home-networking or transmits the massive data.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.10B
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• pp.1013-1020
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• 2009

This paper proposes an authentication protocol using the key server in the ECPglobai RFID system. The proposed authentication protocol uses the key server and the time-out mechanism to resist various attacks including DoS(Denial of Service) attack. For easy implementation, the proposed protocol also uses the function existing in EPCglobal class 1 gen2 protocol without additive function such as hash function. The proposed protocol is evaluated through two analytical methods. The correctness of the proposed protocol is proved using the GNY analysis. By the security analysis, this paper showed that the proposed protocol is resistant to various attacks including DoS attack. The analytical results demonstrated that the proposed protocol offered a secure RFID system.

• The KIPS Transactions:PartC
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• v.10C no.3
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• pp.253-264
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• 2003

This paper presents the analytic model of Distributed Denial-of-Service (DDoS) attacks in two settings: the normal Web server without any attack and the Web server with DDoS attacks. In these settings, we measure TCP flag rate, which is expressed in terms of the ratio of the number of TCP flags, i.e., SYN, ACK, RST, etc., packets over the total number of TCP packets, and Protocol rate, which is defined by the ratio of the number of TCP (UDP or ICMP) packets over the total number of W packets. The experimental results show a distinctive and predictive pattern of DDoS attacks. We wish our approach can be used to detect and prevent DDoS attacks.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.910-913
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• 2012

통신기술의 발달과 스마트 폰의 급격한 보급으로 인하여 모바일 환경은 음성 데이터 기반의 환경에서 인터넷 데이터 기반의 환경으로 급격히 변화되었다. 이로 인하여 음성 서비스 처리 위주의 음성 데이터 기반 모바일 환경은 대용량 동영상 서비스, 인터넷, 메신저 등의 유선 네트워크 환경과 같은 다양한 서비스가 요구되는 환경으로 변화되었다. 이러한 환경 변화로 인하여 모바일 네트워크는 무선 네트워크상의 취약점 뿐 만 아니라 유선환경의 네트워크 취약점을 동시에 지니는 환경으로 변화되었고, 이로 인한 다양한 새로운 취약점들이 부각되기 시작하였다. 본 논문에서는 이와 같이 새롭게 부각되고 있는 모바일 Packet Switched Core Network(PSCN) 환경에서 Service Provider(SP)의 Service Recover로 인해 유발되는 Paging Table Denial of Service(PT-DoS)를 효율적으로 제어하기 위한 Delay Access Control(DAC) 기반의 QoS를 이용한 방법을 설계/구현하였다. 그리고 실험을 통해, PT-DoS를 차단하여 PSCN 공격을 미연에 방지하는 효과를 확인하였다.

• Convergence Security Journal
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• v.23 no.1
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• pp.63-68
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• 2023

In this study, in relation to blockchain protocol and network security, we study the configuration of blockchain and encryption key management methods on smart contracts so that we can have a strong level of response to MITM attacks and DoS/DDoS attacks. It is expected that the use of blockchain technology with enhanced security can be activated through respond to data security threats such as MITM through encryption communication protocols and enhanced authentication, node load balancing and distributed DDoS attack response, secure coding and vulnerability scanning, strengthen smart contract security with secure consensus algorithms, access control and authentication through enhanced user authentication and authorization, strengthen the security of cores and nodes, and monitoring system to update other blockchain protocols and enhance security.

• Journal of the Korea Society of Computer and Information
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• v.15 no.4
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• pp.19-25
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• 2010

In this paper, the performance of the DoS information security algorithm is evaluated to provide the multimedia traffic between the nodes using the multicasting services. The essence technology for information security to distribute the multimedia contents is presented. Under the multicasting services, a node participating new group needs a new address and the node compares the collision with the existing nodes, then DoS attack can be occurred between the nodes by a malicious node. Using the NS2 simulator, the number of DoS attacks, the average number of trials to generate new address, and the average time to create address are analyzed. From simulation results, the efficient algorithm with relevant random number design according to the DRM network is needed to provide secure multimedia contents distribution.