• 제목/요약/키워드: Security transmission

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A Study of Secure Data Transmission on Web-Based Monitoring and Control System

  • Myung, Jinhei
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2002년도 ICCAS
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    • pp.54.1-54
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    • 2002
  • 1. Introduction 2. Related Work 3. Secure Data Transmission on web-based monitoring and control System 3.1 Requirement facts with the Security for the Secure Data Transmission 3.2 Architecture for the Secure Data Transmission 4. Conclusions and Further Research

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Theoretical study on electrical behavior of carbon chain inserted single-walled carbon nanotubes compared with Pt doped one

  • Cui, Hao;Zhang, Xiaoxing;Xiao, Hanyan;Tang, Ju
    • Carbon letters
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    • 제25권
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    • pp.55-59
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    • 2018
  • Carbon chain inserted carbon nanotubes (CNTs) have been experimentally proven having undergone pronounced property change in terms of electrical conductivity compared with pure CNTs. This paper simulates the geometry of carbon chain inserted CNTs and analyzes the mechanism for conductivity change after insertion of carbon chain. The geometric simulation of Pt doped CNT was also implemented for comparison with the inserted one. The results indicate that both modification by Pt atom on the surface of CNT and addition of carbon chain in the channel of the tube are effective methods for transforming the electrical properties of the CNT, leading to the redistribution of electron and thereby causing the conductivity change in obtained configurations. All the calculations were obtained based on density functional theory method.

Designing Flexible Packets for Multi-Satellite Data Transmission in a Physical Network Separation Environment

  • Baek, Hyun Chul;Lee, Sang Jeong
    • 항공우주시스템공학회지
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    • 제14권6호
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    • pp.26-35
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    • 2020
  • The national satellite operation network, which supports multiple satellites, was designated as a Critical Information Infrastructure (CII) in 2017. The network was designed independently from the control network and the information network to enhance physical security. Planning is underway to establish a bidirectional data interface between networks. The data transmission system allows data flow only to the physical layer and the data link layer; hence, only one file can be transferred at any one time. This means that when large amounts of data are being transmitted, no other data can be sent simultaneously in urgent situations. Thus, this paper discusses the design of flexible packets for the transmission of data between networks in an environment where physical security has been enhanced through network separation and based on this, presents a method for transmitting data effectively.

무아레를 이용한 융합 보안토큰생성과 전파공격 보호 기법 (A Scheme of Improving Propagation Attack Protection and Generating Convergence Security Token using Moire)

  • 이수연;이근호
    • 한국융합학회논문지
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    • 제10권2호
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    • pp.7-11
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    • 2019
  • 급격한 전파를 이용하는 기기의 다양화와 대중화로 인해 많은 전파 관련 보안 문제들이 일어나고 있다. 일상적인 생활에서의 전파의 안전은 매우 밀접한데 전파의 방해와 교란은 단순 생활의 불편뿐 아니라 신체의 직접적인 피해를 입힐 수도 있기 때문에 전파보호는 매우 중요한 과제이다. 본 논문에서는 전파 교란과 교섭을 막기 위한 방안으로 백색광 광원, 투영격자와 광원으로 영사식 무아레를 측정 하여 기준격자 및 변형격자의 영사 이미지를 획득한 후 위상도를 알고리즘에 적용하여 화상처리 알고리즘으로 무아레 무늬를 생성하고 무늬 위상도를 3차원 형상도로 생성한다. 이렇게 측정된 얼굴 형상을 이용한 암호화된 토큰을 만들어 토큰링을 통한 정보의 수신여부를 결정 하여 인증 강도, 호출자의 정보 등이 포함된 동적 보안 속성을 가진 수평 전파를 전송하고 java직렬화와 직렬화 해제 기능을 이용하여 토큰의 고유성을 확인 수평전파를 송 수신 하여 문제점을 해결하는 기법을 제안하였다.

Mobile Ad-hoc Network에서 영역기반 보안 멀티캐스트 기법 연구 (A Study on Region-based Secure Multicast in Mobile Ad-hoc Network)

  • 양환석
    • 디지털산업정보학회논문지
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    • 제12권3호
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    • pp.75-85
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    • 2016
  • MANET is a network composed only mobile network having limited resources and has dynamic topology characteristics. Therefore, every mobile node acts as a route and delivers data by using multi-hop method. In particular, group communication such as multicast is desperately needed because of characteristics such as battery life of limited wireless bandwidth and mobile nodes. However, the multicast technique can have different efficient of data transmission according to configuring method of a virtual topology by the movement of the nodes and the performance of a multicast can be significantly degraded. In this paper, the region based security multicast technique is proposed in order to increase the efficiency of data transmission by maintaining an optimal path and enhance the security features in data transmission. The group management node that manages the state information of the member nodes after the whole network is separated to area for efficient management of multicast member nodes is used. Member node encrypts using member key for secure data transmission and the security features are strengthened by sending the data after encrypted using group key in group management node. The superiority of the proposed technique in this paper was confirmed through experiments.

Reliability Evaluation of Power System Operations Considering Time-Varying Features of Components

  • Hu, Bo;Zheng, Ying;Yang, Hejun;Xia, Yun
    • Journal of Electrical Engineering and Technology
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    • 제10권4호
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    • pp.1422-1431
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    • 2015
  • The reliability of power system components can be affected by a numbers of factors such as the health level of components, external environment and operation environment of power systems. These factors also affect the electrical parameters of power system components for example the thermal capacity of a transmission element. The relationship of component reliability and power system is, therefore, a complex nonlinear function related to the above-mentioned factors. Traditional approaches for reliability assessment of power systems do not take the influence of these factors into account. The assessment results could not, therefore, reflect the short-term trend of the system reliability performance considering the influence of the key factors and provide the system dispatchers with enough information to make decent operational decisions. This paper discusses some of these important operational issues from the perspective of power system reliability. The discussions include operational reliability of power systems, reliability influence models for main performance parameters of components, time-varying reliability models of components, and a reliability assessment algorithm for power system operations considering the time-varying characteristic of various parameters. The significance of these discussions and applications of the proposed techniques are illustrated by case study results using the IEEE-RTS.

반송정수장 CCTV망의 구조개선을 통한 운영효율화 및 보안성 개선사례에 관한 연구 (A study on operation efficacy and security improvement through structural modification of CCTV network for bansong water purification plant)

  • 박은철;최현주
    • 상하수도학회지
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    • 제32권2호
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    • pp.193-200
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    • 2018
  • Owing to the development in information and communications technologies have improved the technology for high-speed transmission of massive data, which has changed closed-circuit television (CCTV) video transmission technology. In particular, digitization of the CCTV video format and streaming technology has made it possible to minimize transmission loss and integrate video transmission and camera control(pan/tilt). It has also become possible to provide additional services like remote emergency warning broadcasting with just Internet Protocol (IP). However, because of the structural problems of IP, these changes have also brought about the threat of hacking of CCTV monitoring systems. In this study, we propose a methode to optimize network management by examining cases of enhancement of operational efficiency and security by improving the structure of CCTV monitoring network.

항공응급의료 환경에서 환자 개인정보의 보안 전송에 관한 고찰 (Study on Security Transmission of Personal Patient Information in Aerial Emergency Medical Environments)

  • 김순석;이용희;김동호;정호영;박세일
    • 한국항행학회논문지
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    • 제16권1호
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    • pp.103-108
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    • 2012
  • 항공응급의료 환경에서 기본적인 서비스 모델은 응급구조헬기 내에 장착된 각종 의료장비들로부터 게이트웨이로 수집된 환자 개인건강정보들을 최종 목적지인 후송 병원에 전송하는 과정이라 볼 수 있다. 본 논문에서는 이 과정에서 의료장비에서 게이트웨이로 환자개인정보를 전송시 가장 안전한 전송방식에 대해 고찰하고자 한다. 또한 국제 표준인 ISO/IEEE 11073을 기본 모델로 하여 기존에 나와있는 여러 전송 방식들 중 항공응급의료 환경에 가장 적합한 보안 전송 방식을 비교 분석하여 그 대안을 제시하고자 한다.

Two Factors Failure Model of Oil-Paper Insulation Aging under Electrical and Thermal Multistress

  • Li, Jian;Wang, Yan;Bao, Lianwei
    • Journal of Electrical Engineering and Technology
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    • 제9권3호
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    • pp.957-963
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    • 2014
  • Converter transformers play important roles in high-voltage direct current transmission systems. This paper presents experimental and analysis results of the combined electrical and thermal aging of oil-impregnated paper at pulsating DC voltages. Breakdown voltages and time-to-breakdown of oil-paper specimens were measured by using short-time and constant-stress tests. The breakdown characteristics of combined electrical and thermal aging on insulation system were discussed. According to the relationship between failure time and aging temperature, the two-parameter Weibull model was improved. On the basis of the competing risk algorithm and the improved Weibull model, the two factors failure model was calculated. And the influence of temperature in the insulation system has been analyzed. This model performs better than the two-parameter Weibull model when both time and temperature are considered as variables in estimating the lifetime of oil-paper insulation.

병렬 TCP 통신을 이용한 스마트폰 실시간 스트리밍 서비스 (Smartphone Real Time Streaming Service using Parallel TCP Transmission)

  • 김장영
    • 한국정보통신학회논문지
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    • 제20권5호
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    • pp.937-941
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    • 2016
  • 본 논문에서는 전 세계 스마트폰 기기 시장을 양분하고 있는 안드로이드 스마트폰을 이용하여 원격지에 있는 영상을 실시간으로 확인할 수 있는 시스템을 설계하고 제안하였다. 이 무선 영상 전송 시스템은 개인이 실시간 현지 상황을 서버에 접속한 단말들에 전달하거나 이동 가능한 드론, 로봇 차량 등의 장치에 설치하여 현장 확인, 영상을 통한 보안 감시로 이용할 수 있을 것이다. 보안 감시 및 재난안전 예방을 위해 데이터를 긴급히 보내야하는 경우도 있다. 이러한 이용 분야들에 적용하면 응급상태나 재난예방, 보안감시에 있어 중요한 역할을 한다. 따라서 효율적인 실시간 스트리밍 전송을 위해서 본 논문에서는 병렬 TCP 통신 (parallel stream)을 이용하여 구현하였다. 결론적으로, 병렬 TCP 통신을 이용한 시스템의 효과를 다양한 환경에서 평가하고 성능 분석도 하였다.