• Convergence Security Journal
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• v.5 no.3
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• pp.75-86
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• 2005

Recently, illegal manipulation and forgery threats on computer softwares are increasing due to the advances in reverse engineering techniques. Furthermore someone who has concerns about these area can crack the software by using the open-to-public simple tools on the internet. The software companies are struggling to defend their own softwares against threats, while the crackers are continuing to crack the softwares. In this paper, we first establish the generic software threat model and, analyze and experiment on the software cracks, before suggest a memory hacking prevention system in Microsoft Windows environment.

• Convergence Security Journal
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• v.14 no.2
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• pp.57-63
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• 2014

Internet users drastically increases, also through the Internet to buy various intrusion significantly increased. These various methods of intrusion defense thinking hacker attempting to hack the actual position of the real-time tracking of the intruder backtracking technique for research have been actively carried out. In this paper, a technique used in TCP Connection trace-back System in one packet trace-back technique watermarking technique using TCP Hijacking Connection Reply packets how to solve the difficulties of maintaining presented.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.05a
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• pp.650-653
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• 2011

In this paper, we describe Bluetooth system and Bluetooth security. And we analyze the structure of information security and vulnerability, introduced one of Bluetooth hacking techniques. We show a demo of the attack process to inject arbitrary hands-free voice messages and save the file information, recording a conversation through hands-free device.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.12 no.10
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• pp.5159-5178
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• 2018

Network Intrusion detection is a rapidly growing field of information security due to its importance for modern IT infrastructure. Many supervised and unsupervised learning techniques have been devised by researchers from discipline of machine learning and data mining to achieve reliable detection of anomalies. In this paper, a deep convolutional neural network (DCNN) based intrusion detection system (IDS) is proposed, implemented and analyzed. Deep CNN core of proposed IDS is fine-tuned using Randomized search over configuration space. Proposed system is trained and tested on NSLKDD training and testing datasets using GPU. Performance comparisons of proposed DCNN model are provided with other classifiers using well-known metrics including Receiver operating characteristics (RoC) curve, Area under RoC curve (AuC), accuracy, precision-recall curve and mean average precision (mAP). The experimental results of proposed DCNN based IDS shows promising results for real world application in anomaly detection systems.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2003.07a
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• pp.312-315
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• 2003

인터넷을 이용한 다양한 서비스들이 제공되면서 인터넷 사용자가 급증하였고, 인터넷침해 사고 역시 크게 증가하였으며, 그 피해는 점차 매우 광범위해졌다. 이와 같이 급증하는 해킹을 보다 효과적으로 분석하기 위해 몇몇 해킹 분류 기법들이 제안되었다. 그러나, 현재까지 제안된 해킹 분류 기법들은 단순히 해킹에 사용되는 취약점을 이용한 분류로, 이는 통계자료로만 활용될 뿐, 이를 통해 추가적인 정보를 얻을 수는 없었다. 이에 본 논문에서는 이와 같은 단점을 극복하기 위해, 해킹에 의해 발생할 수 있는 피해의 정도에 따라 해킹 기법들을 분류하고, 제안한 분류 기법을 통해 침해에 대한 기본적인 대응 방법을 제안함으로써 발생하는 다양한 침해에 대해 신속히 대처할 수 있는 기본 틀을 제공하도록 한다.

• Journal of Korea Multimedia Society
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• v.18 no.3
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• pp.330-338
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• 2015

Gradually increasing the value of the technology, the techniques of the various security systems to protect the core technology have been developed. The proposed security scheme, which uses both a Password and the various devices, is always open by malicious user. In order to solve that problem, the biometric authentication systems are introduced but they have a problem which is the secondary damage to the user. So, the authentication methods using EEG(Electroencephalography) signals were developed. However, the size of EEG signals is big and it cause a lot of problems for the real-time authentication. And the encryption method is necessary. In this paper, we proposed an efficient real-time authentication system applied encryption scheme with junk data using chaos map on the EEG signals.

• Journal of Communications and Networks
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• v.14 no.3
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• pp.310-318
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• 2012

Detecting intrusion attacks accurately and rapidly in wireless networks is one of the most challenging security problems. Intrusion attacks of various types can be detected by the change in traffic flow that they induce. Wireless industrial networks based on the wireless networks for industrial automation-process automation (WIA-PA) standard use a superframe to schedule network communications. We propose an intrusion detection system for WIA-PA networks. After modeling and analyzing traffic flow data by time-sequence techniques, we propose a data traffic prediction model based on autoregressive moving average (ARMA) using the time series data. The model can quickly and precisely predict network traffic. We initialized the model with data traffic measurements taken by a 16-channel analyzer. Test results show that our scheme can effectively detect intrusion attacks, improve the overall network performance, and prolong the network lifetime.

• Korean Security Journal
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• no.2
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• pp.161-191
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• 1999

Protection martial arts are neither the ability to protect oneself nor the exercise to increase the personal record. Their aim is to protect clients for the sake of their safety, Therefore, it needs special training course distinguished form general martial arts. Those who perform the duty of protection should make efforts to master every skill capable of meeting any situations in which unforeseen accidents may occur. So the coaches of protection martial arts should teach their disciples basic techniques by stages according to each martial art. They also should teach them systematically how to deal with each accidental affair on the ground of protection method. With teaching the way to cope with a crisis coaches might make the disciples feel real by presenting the real situation of different events to which protection arts can be applicable. And a mock exercise with a careful plan and enough practices as well as a mental training to all evaluate the anxiety which might be shown on duty could be helpful for educating elite personnel who will perform the duty of protection completely.

• Journal of the Society of Disaster Information
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• v.6 no.2
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• pp.11-20
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• 2010

All of the people or objects which are contacted during the activity of guard are added to range of objects. guard has to notice decision, question proposal, observation, accomplish to be happened them at the same time recognizing the steps as soon as possible. Before a lot of information of client are shown, guard expert has to search observation of materialization, extension of reservation, notification of business and causes of danger through personal interviews. Rapid communication system has to be assumed and effective caution, protection and shelter and following prevention are cooperated as well as has to care about safe of guard object by a protective wall. And also has to get out of the ground, keep the large shape when moves, prevent the trials of attack from the assassinators after takeing control over weapons.

• Journal of the Optical Society of Korea
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• v.18 no.5
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• pp.477-484
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• 2014

In this paper, we propose a new optical secret key sharing method based on the Diffie-Hellman key exchange protocol required in cipher system. The proposed method is optically implemented by using a free-space interconnected optical logic gate technique in order to process XOR logic operations in parallel. Also, we present a compact type of optical module which can perform the modified Diffie-Hellman key exchange for a cryptographic system. Schematically, the proposed optical configuration has an advantage of producing an open public key and a shared secret key simultaneously. Another advantage is that our proposed key exchange system uses a similarity to double key encryption techniques to enhance security strength. This can provide a higher security cryptosystem than the conventional Diffie-Hellman key exchange protocol due to the complexity of the shared secret key. Results of numerical simulation are presented to verify the proposed method and show the effectiveness in the modified Diffie-Hellman key exchange system.