• Title/Summary/Keyword: 재난문자

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5G 보안에서의 허위 기지국 대응에 대한 주요 이슈 분석

  • Park, Hun-Yong;Park, Jong-Geun;Kim, Bo-Nam;Yu, Il-Seon
    • Review of KIISC
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    • v.30 no.6
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    • pp.23-30
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    • 2020
  • 2G에서부터 5G 이동 통신 시대까지 허위 기지국 공격의 위협은 이어져 왔다. 허위 기지국은 정상 기지국으로 위장하여 사용자의 정보를 수집하거나 서비스 거부 공격 등을 수행하는 기지국을 말한다. 바로 이전 세대인 LTE에서는 가짜 재난 문자, 멀웨어 전파, Device Bidding Down 공격 등의 사례가 발표 또는 보고되었다. 5G에서도 LTE의 공격 사례와 같은 공격들이 발생할 수 있어 이에 대한 보안 대책이 연구될 필요가 있다. 현재 3GPP TR 33.809 문서에서 5G에서의 허위 기지국 관련 주요 이슈와 솔루션들이 논의되고 있다. 본 논문에서는 TR 33.809 문서를 바탕으로 5G의 보안을 위한 허위 기지국 대응에 대한 주요 이슈들을 중심으로 분석한다.

Development of Electrical Sequence Control Safety Module Circuit Using Artificial Intelligence Controller (인공지능 컨트롤러를 이용한 전기 시퀀스 제어 안전 모듈 회로 개발)

  • Hong Yong Kim
    • Journal of the Society of Disaster Information
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    • v.18 no.4
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    • pp.699-705
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    • 2022
  • Purpose: Sequence control is widely used by being applied to manufacturing, distribution, construction, and automation in the medical industry. With the development of the fourth industry, artificial intelligence convergence technology in the control field is becoming an important factor in the industry. In particular, it is required to evaluate the safety and innovation of facilities where microprocessors and artificial intelligence are fused to existing systems and develop reliable equipment, so it is intended to develop equipment for educational purposes and drive the development of the field. Method: The self-developed all-in-one artificial intelligence controller module is a device that combines artificial intelligence capabilities with existing sequence and PLC control circuits. As the performance evaluation items of this equipment, the recognition ability of motion, voice, text, color, etc. and the stability and reliability of the circuit were evaluated. Conclusion: After designing the sequence and PLC circuit, the performance evaluation items of the integrated integrated artificial intelligence controller module were all satisfied, and there was no problem in the safety and reliability of the circuit.

Development of an Emergency Shelter Guidance App (긴급 대피소 안내 앱 개발)

  • Chi-Hyun Won;Seung-Hwe Choi;Byung-Hyeon Woo;Joon-Hee Kim;Seung-Woo Lee;Jeong-Yeon Yu;Hyung-Bong Lee
    • Proceedings of the Korea Information Processing Society Conference
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    • 2023.11a
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    • pp.285-286
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    • 2023
  • 우리 나라는 오래 전부터 민방위 차원에서 각 지역에 대피소를 선정해두고 정부 해당 부처의 게시판으로 알리고 있다. 그러나, 민방위 훈련이 거의 실시되지 않는 터라 대부분의 국민들은 어느지역에 어떤 대피소가 마련되어 있는지 알지 못한다. 최근에는 민방위 뿐만 아니라 바닷가 해일에 대비하기 위한 대피소도 늘어나고 있는데 이를 알고 있는 국민 또한 많지 않다. 따라서 이 연구에서는 현재 위치 주변에 어떤 대피소가 있는지와 가장 가까운 대피소까지의 길을 안내하는 긴급 대피소 안내 앱을 개발한다. 그 외에 이 앱은 지역별로 최근 발송된 재난 문자를 검색하는 기능도 제공한다.

Design and Implementation of IoT Terminal Equipment for Vessels using Thuraya Geo-stationary Orbit Satellite (Thuraya 정지궤도 위성을 이용한 선박용 IoT 단말 장치 설계 및 구현)

  • Jang, Won-Chang;Lee, Myung-Eui
    • Journal of Advanced Navigation Technology
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    • v.24 no.2
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    • pp.67-72
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    • 2020
  • Satellite communication is not used by many people like mobile communication, but it is a necessary technology for public service and communication services, such as providing the Internet in military, disaster, remote education and medical services, island areas, and infrastructure vulnerable areas. However, on ships and aircraft, mobile communications requiring base stations are either unavailable or restricted in their use. In this paper, we used a Raspberry Pi board as the terminal device to communicate network through satellite modem and PPP protocol, and implemented two-way data link using the text message of the modem to connect to the Thuraya geo-stationary orbit network. In addition, I/O devices were connected to the controller of the terminal equipment to design and implement an IoT device system for ships that can remotely access the system under control and control I/Os and transmit measured data through various sensors.

Implementation of Two-way Data Link using the Thuraya Geostationary Orbit Satellite (Thuraya 정지궤도 위성을 이용한 양방향 데이터 링크 구현)

  • Jang, Won-Chang;Lee, Myung-Eui
    • Journal of Advanced Navigation Technology
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    • v.23 no.5
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    • pp.333-338
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    • 2019
  • Satellite communication is not used by many people like mobile communication, but it is a necessary technology for public service and communication services, such as providing the Internet in military, disaster, remote education and medical services, island areas, and infrastructure vulnerable areas. However, most communication modems have problems with two-way communication with server as IP addresses are assigned to floating IP that change every time they communicate with the network. In this paper, we used the Raspberry Pi as the controller of the terminal device to communicate the network through the satellite modem and the PPP protocol, and to solve the problem of the modem with the floating IP, we used the text message function of the satellite modem. Through this process, two-way data links using the Thuraya geostationary orbit satellite were implemented.

An Investigation of the Factors Affecting Satisfaction with Cell Broadcast Service(CBS) -Focusing on Users in Incheon- (긴급재난문자 만족도에 영향을 미치는 요인 규명 -인천광역시 서비스 대상자를 중심으로-)

  • Park, Keon-Oh;Park, Jae-Young
    • Journal of Environmental Science International
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    • v.33 no.3
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    • pp.193-203
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    • 2024
  • This study aims to determine the factors affecting the level of satisfaction with the Cell Broadcast Service (CBS) among citizens in Incheon. Partial least squares (PLS) regression, instead of multiple regression, was used for the analysis because it can solve multicollinearity and sample size issues. The analysis results are as follows: The factor with the greatest effect on satisfaction with CBS among Incheon citizens, was the elimination of redundancies (VIP=1.185). Therefore, local governments, government agencies, and public organizations must coordinate their ideas and collectively create guidelines to eliminate redundancies. The second most influential factor was the expansion in the broadcast medium from legal, institutional, and policy aspects (VIP=1.087). This is because differences in generation, age, gender, and personal characteristics were not considered. Therefore, it is necessary to devise a customized messaging tool through the expansion of broadcast media. The broadcast criteria of the legal, institutional, and policy perspectives comprised the third most influential factor, with a high VIP value of 1.053. Consequently, it is essential to devise a plan to avoid distributing unnecessary cell broadcast services, by establishing criteria for areas and sections, time, and the direct and indirect impact zones of a disaster. In the future, this study could be used as base data to develop policies, guidelines, and response measures for Incheon CBS. Given the lack of research on the diverse characteristics of each social class and the city traits of each region, and a lack of concrete empirical research on each factor, continuous and in-depth studies are required in the future.

Classification of Soil Creep Hazard Class Using Machine Learning (기계학습기법을 이용한 땅밀림 위험등급 분류)

  • Lee, Gi Ha;Le, Xuan-Hien;Yeon, Min Ho;Seo, Jun Pyo;Lee, Chang Woo
    • Journal of Korean Society of Disaster and Security
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    • v.14 no.3
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    • pp.17-27
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    • 2021
  • In this study, classification models were built using machine learning techniques that can classify the soil creep risk into three classes from A to C (A: risk, B: moderate, C: good). A total of six machine learning techniques were used: K-Nearest Neighbor, Support Vector Machine, Logistic Regression, Decision Tree, Random Forest, and Extreme Gradient Boosting and then their classification accuracy was analyzed using the nationwide soil creep field survey data in 2019 and 2020. As a result of classification accuracy analysis, all six methods showed excellent accuracy of 0.9 or more. The methods where numerical data were applied for data training showed better performance than the methods based on character data of field survey evaluation table. Moreover, the methods learned with the data group (R1~R4) reflecting the expert opinion had higher accuracy than the field survey evaluation score data group (C1~C4). The machine learning can be used as a tool for prediction of soil creep if high-quality data are continuously secured and updated in the future.

The Effect of the Transmission of Coronavirus Disease-2019 on the Mentality of Parents and Children After the First Wave of Infections (1차 확산기 이후 코로나바이러스감염증-2019의 전파가 부모와 아동의 심리에 미치는 영향)

  • Kim, Jeongyeon;Lee, Koeun;Nam, Okhyung;Lee, Hyo-seol;Choi, Sungchul;Kim, Kwangchul;Kim, Misun
    • Journal of the korean academy of Pediatric Dentistry
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    • v.48 no.3
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    • pp.269-279
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    • 2021
  • The purpose of this study is to evaluate the effect of the spread of a new type of coronavirus infection (COVID-19) on the mental state in school-age children and parents focusing on the aspects of sleep disorders and depression. A questionnaire survey was conducted for 123 parents and 108 school-age children who visited Department of Pediatric Dentistry, Kyung Hee University Dental Hospital at Gangdong from April 2, 2020 through April 25, 2020, via the direct writing method. Participants were assessed with Pittsburgh Sleep Quality Index, Generalized Anxiety Disorder (GAD)-7, Center for Epidemiology Scale for Depression. Logistic regressions were used with a level of significance of 5%. The prevalence of GAD, depression, and poor sleep in parents were 34.1%, 17.1% and 44.7%, respectively. The prevalence of GAD in children was 20.4%. Logistic regression showed that stress from Emergency Alert Messages about COVID-19 was associated with GAD and depression in parents. In children, the degree of emotional change after COVID-19 was associated with GAD. This study confirmed that there was a change in the psychological status of children and guardians due to the epidemic of coronavirus disease-2019, and it would be necessary to consider their psychological status during dental treatment.

A Study on Development of Damage Impact Distance Calculation Formula for Accident Response and Prevention in case of Leakage of Substances Prepared for Evacuation of Residents in Chungju (충주의 주민대피 대비물질 누출사고 시 사고대응·예방을 위한 피해영향거리 산정식 개발 연구)

  • Jeon, Byeong-Han;Kim, Hyun-Sub;Lee, Myeong-Ji;Yun, Jeong-Hyeon;Jung, Woong-Yul;Oh, Seung-Bo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.22 no.1
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    • pp.703-712
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    • 2021
  • In this study, a formula was derived to calculate the damage impact distance using the Chemical Accident Response Information System (CARIS) so that local governments can decide on the evacuation and notification of 13 types of substances. The National Institute of Chemical Safety selected 16 out of 97 types of accident preparedness substances in 2018 and called them residents' evacuation preparedness substances. In a chemical accident, local governments should prepare for resident notification, such as emergency disaster texts. Using the CARIS in Chungju, this study modeled the damage-affected distances of 13 types of substances for the evacuation of residents. Under all conditions, the coefficient of determination R2 was 0.99 or higher, representing a range of at least 0.9921 to a maximum 0.9999. The relative standard deviation between the damage impact distance obtained using the calculation formula, and the CARIS result was compared. The minimum separation distance was corrected considering the actual chemical accident response situation, and the range was found to be between 0.58 and 5.97%. The damage impact distance can be calculated at the site using the calculation formula derived from the research, and local governments can determine whether to evacuate or notify residents.

A Study on the Accessibility Requirements Analysis Model for the Preventive Safety and Disaster Service Information System - Focusing on the Communication Ability (정보시스템을 통한 생활안전 위험의 예방·대응을 위한 안전약자 요구사항 분석모델 연구 : 의사소통기능을 중심으로)

  • Lee, Yong-Jick;Ji, Seok-yeon;Kim, Sang-hwa
    • The Journal of Korean society of community based occupational therapy
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    • v.10 no.3
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    • pp.1-13
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    • 2020
  • Objective : The purpose of this study is to present an analysis model in developing an inclusive response for safety hazards and disaster preventive information system for vulnerable people to the disaster including persons with disabilities, and those with specific needs. Methods : In this study, the persona analysis method is used to analyze fictitious characters that correspond to various characteristics such as age, disability, environment, occupation, etc. in terms of the scenario of some particular disaster subjects. Based on the user's communication problems derived from the persona analysis, focused group interview and ICF based analysis were implemented to identify needs and arbitration methods. Results : The needs from persona analysis and ICF-based communication items analysis identifies the factors that make each fictitious character difficult in terms of communication in obtaining the benefits consistent with the purpose of the service. The study derives service requirements that can provide arbitration or facilitation methods to increase communication ability of the users. Conclusion : Through the persona analysis method, difficulties that could occur when receiving disaster information using communication devices were identified and analyzed in conjunction with communication problems described in the ICF. In building information services for the prevention of safety hazards and disasters, this study presented a model that uses the persona analysis method and the ICF classification system to derive user requirements for accessible information system.