• Journal of fish pathology
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• v.22 no.1
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• pp.15-21
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• 2009

White spot syndrome virus (WSSV) is a strong causative agent for high mortality in cultured and wild shrimps. From this study, the WSSV prevalence in marine organisms around shrimp farm as well as live feed-mediated transmission of WSSV to farmed shrimps were investigated. Based on nested-PCR method, WSSV was detected in wide array of marine organisms including Perinereis aibuhitensis (81.3% of prevalence rate, 13/16), Enedrias fangi (100%, 16/16), Ruditapes philippinarum (20%, 2/10), crab larvae (100%, 10/10), copepoda (30%, 3/10), Periophthalmus modestus (50%, 5/10), Pachygrapsus crassipes (10%, 1/10), Helice tridens (20%, 2/10) and Neomysis sp. (70%, 7/10). On the other hand, WSSV was not detected in Bullacta exarata, Uca arcuata, and Reishia clavigera. The percent prevalence of WSSV in wild shrimps, Fenneropenaeus chinensis was only 6%, but markedly increased up to 56% after a feeding trial using polychaete worms for one month, indicating that the live feed is one of significant carriers of WSSV to shrimps under practical farming conditions.

• Convergence Security Journal
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• v.5 no.3
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• pp.15-22
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• 2005

The spread of Internet and the appear of Downsizing, SI(System Integration) is chaning centralized computing to distributed computing. Also distributed computing is rapidly changing to Ubiquitous computing escape from hard wire connected network. CORBA(Common Object Request Broker Architecture) is a middleware that used for smoothness communication between application program and operation system in a different environment. However distributed computing environment is not safe from the danger, the attack like virus, worm is too intellectual and variety. In this paper, we design a new DB security model and suggest efficiency of it in Ubiquitous environment base on CSS(CORBA Security Service) that present ed from OMG(Object Management Group).

• Convergence Security Journal
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• v.6 no.2
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• pp.91-99
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• 2006

As the speed of network has fastened and the Internet has became common, an ill-intentioned aggression, such as worm and E-mail virus rapidly increased. So that there too many defenses created the recent Intrusion detection system as well as the Intrusion Prevention Systems to defense the malicious aggression to the network. Also as the form of malicious aggression has changed, at the same time the method of defense has changed. There is "snort" the most representive method of defense and its Rules file increases due to the change of aggression form. This causes decline of capability for detection. This paper suggest, design, and realize the structure for the improvement of processing capability by separating the files of Snort Rule according to o/s. This system show more improvement of the processing capability than the existing composion.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.4B
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• pp.592-598
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• 2010

A home network system is made up of subject of cyber attack from a variety factors of threatening, but also have security weakness in cases of hacking, vicious code, worm virus, DoS attack, tapping of communication network, and more. So, the necessity for a security protocol to protect user asset and personal information within a home network is gradually increasing. Thus, this paper designs and suggests a home network security protocol using user authentication and approach-control technology to prevent the threat by unauthorized users towards personal information and user asset in advance by providing the gradual authority to corresponding devices based on authorized information, after authorizing the users with a Public Key Certificate.

• Journal of Korea Society of Digital Industry and Information Management
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• v.12 no.1
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• pp.89-95
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• 2016

Recent growth of hacking threats and development in software and technology put Network security under threat, In addition, intrusion, malware and worm virus have been increased due to the existence of variety of sophisticated hacking methods. The goal of this study is to compare Snort Alpha version with Suricata 2.0.11 version whereas previous study focuses on comparison between snort 2. x version under thread environment and Suricata under multi-threading environment. This thesis' experiment environment is set as followed. Intel (R) Core (TM) i5-4690 3. 50GHz (4threads) of CPU, 16GB of RAM, 3TB of Seagate HDD, Ubuntu 14.04 are used. According to the result, Snort Alpha version is superior to Suricata in performance, but Snort Alpha had some glitches when executing pcap files which created core dump errors. Therefore this experiment seeks to analyze which performs better between Snort Alpha version that supports multi packet processing threads and Suricata that supports multi-threading. Through this experiment, one can expect the better performance of beta and formal version of Snort in the future.

• Journal of Convergence Society for SMB
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• v.5 no.1
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• pp.13-18
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• 2015

The malware, as hackers generic name of executable code that is created for malicious purposes, depending on the presence or absence of a self-replicating ability infected subjects, and are classified as viruses, worms, such as the Trojan horse. Mainly Web page search and P2P use, such as when you use a shareware, has become penetration is more likely to occur in such a situation. If you receive a malware attack, whether the e-mail is sent it is automatically, or will suffer damage such as reduced system performance, personal information leaks. While introducing the current malware, let us examine the measures and describes the contents related to the malicious code.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.47 no.12
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• pp.90-96
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• 2010

IT environment is rapidly changed, thus security threats such as worms and viruses have increased. Especially company's internal network requires to be inherently protected against these threats. In this respect, NAC(Network Access Control) has attracted attention as new network security techniques. The NAC implements the endpoint access decision based on the collected endpoint security status information and platform measurement information. In this paper, we describe the design and implementation of unauthorized NAC which protect against such as a worm, virus, malware-infected PC, and mobile device to connect to company's internal networks.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.05a
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• pp.434-437
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• 2017

After the first malware, the brain virus, was founded in 1986, various types of malwares have been created Including worm, dropper, trojan, backdoor, rootkit and downloader. Especially in recent years, driver-type malware have made then more difficult to analyze. therefore, malware analyst require competitive skills. To analyze malware well, you need to know how it works and have to do it by yourself. So in this paper, we develop the dropper, backdoor, trojan, rootkit and driver similar to malware distributed in the real world. It shows the execution behavior on the virtual environment system We propose a method to analyze malware quickly and effectively with static analysis and dynamic analysis.

• Journal of the Korea Society of Computer and Information
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• v.10 no.4 s.36
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• pp.149-154
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• 2005

Computer center of university or company manages many non fault-tolerant servers and network devices to spare expenses. Because a service fault occurs sometimes by worm virus, system bug etc, we need a technique to detect it for continuing service. This paper introduces design and implementation of the system to observe many heterogeneous services, and web-based interface improving convenience of system manager. A system fault is reported to system managers via email or SMS by introduced service observation system, not service user. Then system managers can recover the system fault by this notification and minimize a fault period.

• Review of KIISC
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• v.18 no.3
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• pp.1-16
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• 2008

2008년으로 컴퓨터 바이러스가 제작된 지 이미 20년이라는 세월을 넘기게 되었다. 이 긴 시간 속에서 컴퓨터 바이러스는 파일 감염을 목적으로 하는 바이러스(virus)로부터 네트워크를 통한 급속한 화산을 시도하는 웜(Worm) 그리고 데이터 유출과 파괴를 목적으로 하는 트로이목마(Trojan Horse)로 발달해왔다. 최근에는 컴퓨터 사용자의 정보를 무단으로 유출하기 위한 스파이웨어(Spyware)에 이르기까지 다양한 형태로 변화를 이룩해 왔다. 이러한 다양한 형태로의 변화가 진행되는 동안에도 컴퓨터 과학의 발달에 따른 새로운 기술들을 흡수하여 더욱더 정교하고 파괴적인 기능들로 발전을 이루게 되었다. 다양한 형태와 기술적 인 발전을 거듭한 악성 코드(Malicious Code)는 컴퓨터 운영 체제, 네트워크의 발달로 이룩된 컴퓨터 과학사와 함께 하였다고 볼 수 있다. 악성 코드의 발전은 해가 갈수록 수치적인 면에서는 증가 추세를 이루고 있으며 기술적인 면에서도 더욱더 위험성을 더해 가고 있으며 그 제작 목적 또한 전통적인 기술력 과시에서 금전적인 이익을 취하기 위한 도구로 전락하고 있다. 이렇게 제작 목적의 변질로 인해 악성 코드는 인터넷 공간에서 사이버 범죄를 발생시키는 원인 중 하나로 변모하게 되었다. 본 논문에서는 이러한 발전적인 형태를 띠고 있는 악성 코드에 대해서 최근 동향을 바탕으로 어떠한 악성코드와 스파이웨어의 형태가 발견되고 있는지 그리고 최근 발견되고 있는 악성코드에서 사용되는 소프트웨어 취약점들을 살펴보고자 한다. 그리고 이러한 악성코드의 형태에 따라 향후 발생할 수 있는 새로운 악성 코드의 위협 형태도 다루어 보고자 한다.