• Title/Summary/Keyword: 크래킹

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A Security Analysis by Cracking in Wireless Routers (무선 공유기 크래킹을 통한 보안성 분석)

  • Han, Sang-Hoon;Koo, Kyo-Rim;Go, Eun-Sik;Park, Han-Sol;Kim, Hyun-Tae;Song, Do-Yong
    • Proceedings of the Korean Society of Computer Information Conference
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    • pp.399-400
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    • 2017
  • 모바일기기들의 폭발적인 확장에 따라 무선 인터넷의 이용율이 기하급수적으로 늘어나고 있다. 특히 무선 공유기를 이용하여 가정이나 중소기업 등이 사설 네트워크를 구성하여 무선 랜 환경이 매우 확대되고 있다. 본 논문에서는 무선 랜 환경에서의 취약점에 대한 분석을 하고, 공개 소프트웨어를 이용하여 무선 공유기에서 지원하는 암호화 방식에 따른 크래킹과 키 값의 난이도에 따른 크래킹 과정을 실험을 통하여 확인하고 이에 대한 대응 방안을 제시한다.

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Design & Implementation of Network Monitering Tool (네트워크 모니터링 툴의 설계 및 구현)

  • 윤종철;곽인섭;강흥식
    • Proceedings of the Korean Information Science Society Conference
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    • pp.646-648
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    • 2002
  • 인터넷과 네트워킹 기술의 비약적인 발전으로 인해 수많은 프로토콜들과 관련 기술, 그리고 서비스들이 새롭게 등장하였다. 하지만 설계상에서 보안에 대해 고려되지 않았던 많은 기술들은 이제 새로운 보안 위협을 발생시키는 등의 문제점을 드러내고 있다. 네트워크를 통한 크래킹 역시 이러한 문제점으로 지적되고 있는데, 이러한 위협으로부터 시스템을 보호하기 위해 방화벽, 침입탐지 시스템과 같은 정보보호 시스템들이 연구, 개발되었다. 본 논문에서 제안하는 네트워크 모니터링 도구는 스니핑이라는 해킹 기법으로 이용되기도 하는 다소 위험한 기술을 이용하여 네트워크상의 패킷을 실시간으로 수집, 분석함으로써 네트워크 관련 오류의 점검, 크래킹의 실시간 감시등에 이용할 수 있도록 해준다.

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A Study on Memory Hacking Prevention System in Windows Environment (윈도우 환경에서의 메모리 해킹 방지 시스템 연구)

  • Kim, Yo-Sik;Yun, Young-Tae;Park, Sang-Seo
    • 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.

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State Transition Algorithm for Penetration Scenarios Detection using Association Mining Technique (연관마이닝 기법을 이용한 침입 시나리오 탐지를 위한 상태전이 알고리즘)

  • 김창수;황현숙
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.720-723
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    • 2001
  • 현재 인터넷 환경에서 크래킹은 보편화되어 있다. 이러한 크래킹을 탐지하거나 방어하기 위한 기법들은 대부분 기존의 불법 침입 유형을 분석하여 대응 알고리즘을 개발하는 것이 대부분이다. 현재 알려진 침입 탐지 기법은 비정상 탐지(Anomaly Detection)와 오용 탐지(Misuse Detection)로 분류할 수 있는데, 전자는 통계적 방법, 특징 추출 등을 이용하며, 후자는 조건부 화률, 전문가 시스템, 상태 전이 분석, 패턴 매칭 둥을 적용한다. 본 연구에서는 상태전이 기반의 연관 마이닝 기법을 이용한 침입 시나리오 탐지 알고리즘을 제안한다. 이를 위해 본 연구에서는 의사결정지원시스템에서 많이 적용한 연관 마이닝 기법을 여러 가지 불법 침입과 연관된 상태 정보를 분석할 수 있는 수정된 상태전이 알고리즘을 제시한다.

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Development of Jet-Fuel Using Petroleum Displacement Resources (석유대체자원을 이용한 항공유제조기술)

  • Jeong, Soon-Yong;Kim, Chul-Ung;Jeong, Kwang-Eun;Koh, Jae-Cheon;Chae, Ho-Jeong;Kim, Tae-Wan;Park, Hyun-Joo;Lee, Sang-Bong;Han, Jeong-Sik;Jeong, Byung-Hun
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • pp.307-310
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    • 2010
  • The research for production of jet fuel from petroleum displacement resources such as bio-mass, coal, natural gas mainly consists of three sub-research areas; the fisrt step is the pretreatment for producing a synthetic gas, and the next step is the Fischer-Trophsh reaction process for making hydrocarbons. The last is the upgrading technology for the hydrocarbons to fit a jet fuel specification via cracking and isomerization reactions. This talk presents reaserch trends and main technologies for production of jet fuel derived from petroleum displacement resources.

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Study on Vulnerability and Countermeasures of Authentication Mechanism in Wireless LAN (무선 랜 환경 인증 메커니즘의 취약성 분석 및 대응방안 연구)

  • Choi, Jin-Ho;Oh, Soohyun
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.22 no.6
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    • pp.1219-1230
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    • 2012
  • Recently, lots of users are using wireless LAN providing authentication and confidentiality with security mechanism such as WEP, WPA. But, weakness of each security mechanism was discovered and attack methods that user's information was exposed or modified to the third parties with it and abused by them were suggested. In this paper, we analyzed architecture of security mechanisms in wireless LAN and performed PSK cracking attack and cookie session hijacking attack with the known vulnerability. And, an improved 4-way handshake mechanism which can counter PSK cracking attack and a cookie replay detection mechanism which can prevent cookie session hijacking attack were proposed. Proposed mechanisms are expected to apply to establish more secure wireless LAN environment by countering existing vulnerability.

A Study on the Modus Multiplier design on Enhancing Processing Speed in the RSA cryptosystem (RSA 암호시스템에서 처리속도향상을 위한 모듈러 승산기 설계에 관한 연구)

  • 정우열
    • Journal of the Korea Society of Computer and Information
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    • v.6 no.3
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    • pp.84-90
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    • 2001
  • The development of network and the other communication-network can generate serious problems. So, it is highly required to control security of network. These problems related secu be developed and keep up to confront with anti-security part such as hacking, cracking. Th way to preserve security from hacker or cracker without developing new cryptographic algori keeping the state of anti-cryptanalysis in a prescribed time by means of extending key-length In this paper, the proposed montgomery multiplication structured unit array method in carry generated part and variable length multiplicator for eliminating bottle neck effect with the RSA cryptosystem. Therefore, this proposed montgomery multiplicator enforce the real time processing and prevent outer cracking.

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Start and Stop Characteristics of Single-Rod Electro-Hydrostatic Actuator (전동기 일체형 편로드 유압액추에이터의 기동 및 정지특성해석)

  • Jung, Gyu-Hong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.35 no.11
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    • pp.1483-1490
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    • 2011
  • Electro-hydrostatic actuators(EHAs), which are usually composed of a direct motor-driven hydraulic pump and a cylinder, have been widely adopted as aircraft actuation systems because of their benefits in terms of improved efficiency, weight savings and the fact that they use a standalone power source. Since the recent trend in construction vehicles has been focus on energy savings in their hydraulic systems, EHAs are expected to be potential substitutes for conventional power transmission, since they are capable of energy recovery as well as highly efficient pump control. In this paper, the start and stop characteristics of EHAs were investigated through cracking pressure analysis of the pilot-operated check valve(PCV), which enables the cylinder to standstill against an external load with no holding effort from the hydraulic pump. A mathematical model that includes the load dynamics and the EHA's internal hydraulic circuit was derived for simulation with the MATLAB Simulink package. This model verified the PCV's opening and closing sequence, which in turn affects the EHA's start and stop characteristics.

Preparation of Pitch for Melt-electrospinning from Naphtha Cracking Bottom Oil (납사 크래킹 잔사유로부터 용융전기방사용 핏치 제조)

  • Kim, Jinhoon;Lee, Sung Ho;Lee, Young-Seak
    • Applied Chemistry for Engineering
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    • v.24 no.4
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    • pp.402-406
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    • 2013
  • In this study, a pitch for melt-electrospinning was prepared from naphtha cracking bottom (NCB) oil by the modification with heat treatment. The softening point and property of the modified pitch was influenced by modification conditions such as nitrogen flow rate, heat treatment temperature, and reaction time. Among these, the heat treatment temperature had a very strong influence on the distribution of molecular weight and softening point of the pitch. The C/H mole ratio and average molecular weight increased with increasing the heat treatment temperature due the decomposition and cyclization reaction of surface-functional groups. In addition, the values of benzene insoluble and quinoline insoluble also tends to decrease, and the width of molecular weight distribution seems to get more narrow. The carbon fiber with a diameter of $4.8{\mu}m$ was prepared from a modified pitch at the softening point of $155^{\circ}C$ by melt-electrospinning. It is believed that the melt-electro spinning method is much more convenient to get the thinner fiber than the conventional melt spinning method.