• International Journal of Computer Science & Network Security
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• v.21 no.9
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• pp.132-140
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• 2021

Under the mobile ad-hoc network system, the main reason for causing congestion is because of the limited availability of resources. On the other hand, the standardised TCP based congestion controlling mechanism is unable to control and handle the major properties associated with the shared system of wireless channels. It creates an effect on the design associated with suitable protocols along with protocol stacks through the process of determining the mechanisms of congestion on a complete basis. Moreover, when bringing a comparison with standard TCP systems the major environment associated with mobile ad hoc network is regraded to be more problematic on a complete basis. On the other hand, an agent-based mobile technique for congestion is designed and developed for the part of avoiding any mode of congestion under the ad-hoc network systems.

• International Journal of Computer Science & Network Security
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• v.24 no.3
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• pp.211-223
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• 2024

Chatbots have become very popular in our times and are used in several fields. The emergence of chatbots has created a new way of communicating between human and computer interaction. A Chatbot also called a "Chatter Robot," or conversational agent CA is a software application that mimics human conversations in its natural format, which contains textual material and oral communication with artificial intelligence AI techniques. Generally, there are two types of chatbots rule-based and smart machine-based. Over the years, several chatbots designed in many languages for serving various fields such as medicine, entertainment, and education. Unfortunately, in the Arabic chatbots area, little work has been done. In this paper, we developed a beneficial tool (chatBot) in the Arabic language which contributes to educating people about the Prophet's biography providing them with useful information by using Natural Language Processing.

• Convergence Security Journal
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• v.6 no.1
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• pp.13-23
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• 2006

It is more desirable to execute AV software on server systems rather than on clients for the minimization of damages due to malicious codes. AV software on server system, however, may aggravate the load of server system. In this paper, we propose a new AV software executed on server system without additional loads with a monitor and multi-agent model. The new AV software supports dynamic load balancing that reflects the features of AV engine, and thus it can be executed efficiently on server systems. The results of performance evaluation on the AV software attest to the strong points of the new AV software.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2001.11a
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• pp.453-458
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• 2001

악의의 침입자로부터 시스템을 보호하기 위한 첫 번째 단계는 시스템의 취약점을 분석하는 일이다. 기존의 시스템 취약점 분석 방법은 주로 네트워크 기반 취약점 점검 도구에 의존해 왔다. 하지만, 네트워크 기반 취약점 점검 도구는 대상 시스템의 제한된 정보만을 이용하여 취약점을 점검하기 때문에 시스템의 모든 취약점에 대한 검사가 불가능하다는 단점이 있다. 호스트 기반 취약점 점검 도구를 사용하면 시스템 내부의 모든 정보를 이용할 수 있지만, 시스템의 OS 종류나 버전에 따라 각기 다른 호스트 기반 취약점 점검 도구를 개발해야 한다는 단점이 있다. 또한, 호스트 기반 취약점 점검 도구들은 많은 호스트들을 동시에 점검하기 힘들다는 점이 문제로 지적되고 있다. 본 논문에서는 호스트 기반 취약점 점검 도구를 에이전트로 구현하여 대상 시스템에 설치하고, 하나의 관리 프로그램에서 여러 에이전트들을 관리함으로써 동시에 많은 호스트의 취약점들을 관리할 수 있는 모델인 ISMAEL을 제시한다. 또한 ISMAEL은 OS에 맞는 여러 호스트 기반 취약점 점검 도구들을 개발해야 하는 문제를 해결하기 위해 OS에 독립인 부분만을 뽑아내고, 그 외 OS에 종속된 부분은 Library 형태로 제공하여, OS에 독립인 부분에서 이 Library를 참조하여 특정 취약점 점검 코드를 자동 생성하고 이를 실행하여 취약성 여부를 판단할 수 있는 구조를 채택하고 있다.

• Journal of the Korea Computer Industry Society
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• v.5 no.2
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• pp.235-242
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• 2004

As e-business being rapidly developed the importance of security is on the rise in network. Intrusion detection systems which are a core security system detect the network intrusion trial. As intrusions become more sophisticated, it is beyond the scope of any one IDS to deal with them. Thus we placed multiple IDS agents in the network and the information helpful for detecting the intrusions is shared among these agents to cope effectively with attackers. Each agent cooperates through the BBA (Black Board Architecture) and CNP (Contract Net Protocol) for detecting intrusions. In this paper, we propose the effective method comparing the blackboard architecture to contract net protocol.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.160-161
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• 2013

Extending mobile IP to ad hoc networks with the foreign agent acting as the bridge between the wired network and ad hoc networks can provide the global Internet connectivity for ad hoc hosts. The existing research in the area of the integrated wired and ad hoc network is carried out in a non-adversarial setting. This paper analysed an effective solution to solve the security related problems encountered in these integrated networks. This security protocol also excludes malicious nodes from performing the ad hoc network routing. This paper focuses on preventing ad hoc hosts from the attacks of anti-integrity.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.866-870
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• 2009

Mobile Health (M-Health) system is a recent term for medical and public health practice supported by mobile devices, such as mobile phones, PDAs, and other wireless devices. Mobile Health system has been successfully establishing at few general hospital in Korea. However, to use diverse devices manufactured by various company cause inoperability, and lack of security disappoints customers often. Although the outstanding health environment, most of hospitals are unavailable to share electronic patient records due to lack of standard protocol to handle the interoperability each other. Health Level 7 (HL7) is the best solution for the problem. In this paper, we will analyse a current M-Health service in terms of security and mobile device, and suggest iPhone for the best device against hospital environment. Also, for keep confidentiality of health information and patient privacy, enhanced security mechanism is introduced. As a consequence, interoperable standard, and most appropriate device for supporting staffs and M-Health performance, and enhanced securirty mechanism will be integrated in order to propose improved M-health model.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.18 no.1
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• pp.49-57
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• 2008

In this paper, we propose a novel hierarchical distributed intrusion detection system, named HNHDIDS(Home Network Hierarchical Distributed Intrusion Detection System), which is not only based on the structure of distributed intrusion detection system, but also fully consider the environment of secure home networks service. The proposed system is hierarchically composed of the one-class support vector machine(support vector data description) and local agents, in which it is designed for optimizing for the environment of secure home networks service. We support our findings with computer experiments and analysis.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.33 no.6
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• pp.1001-1020
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• 2023

As massive increase in remote work since COVID-19, the boundaries between the inside and outside of corporate networks have become blurred. As a result, traditional perimeter security has stagnated business productivity and made it difficult to manage risks such as information leakage. The zero trust architecture model has emerged, but it is difficult to apply to IT environments composed of various companies. Therefore, using the remote work system configuration as an example, we presented a configuration and methodology that can apply zero trust models even in various network environments such as on-premise, cloud, and network separation. Through this, we aim to contribute to the creation of a safe and convenient cyber environment by providing guidance to companies that want to apply zero trust architecture, an intelligent system that actively responds to cyber threats.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10a
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• pp.527-529
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• 1998

이동에이전트는 인터넷 상거래나 장도검색 등에 응용되는 최신 기술이며, 이를 컴퓨터네트워크내 컴퓨터 시스템의 보안관리을 위한 모델을 제안하고 설계하였다. 이를 위해 최근 발표되고 있는 이동 에이전트 기술에 대해 분석하고, 네트워크보안관리 기술을 연구하였으며 IBM 이 제안하고 있는 AGLET 환경에 네트워크보안관리 시스템을 탑재한 이동 에이전트 응용시스템을 설계하였다.