• The Journal of the Korea institute of electronic communication sciences
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• v.12 no.1
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• pp.147-154
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• 2017

This paper aims to build a home security system based on IoT to monitor a home on a mobile phone. The system consists of data gathering sensors, camera, gateway and Xively platform. The Raspberry Pi collects data from the three sensors and sends the data to Xively, and sends the video stream of home to a client in a smart phone through a internet. The servers are composed of Xively, socket server in Raspberry Pi and E-mail server in Google. The proposed system transmits e-mail, text message, and video stream when there are motion, fire, and gas leakage, and can control the gas valve through Raspberry Pi. The experimental results show that a user gets 'emergency E-mail' and text message and watches the video stream of the home through WIFI or LTE on a smart phone.

• The KIPS Transactions:PartC
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• v.8C no.1
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• pp.16-22
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• 2001

There are several traditional factors of software quality. Some of them are such as correctness, reliability, efficiency, compatibility, portability, etc. In addition to them, security is required as another factor of software quality nowadays because some application programs are used as a way to attack information systems by stack frame manipulation. Each processor has its own peculiar stack frame mechanism and C language uses the characteristics of them. This paper explains the concept of security problem caused by stack frame manipulation, and the stack frame mechanism of Pentium, Alpha and SP ARC processor in detail. And then it examines the effect of stack frame mechanism on the security of programs in C language.

• Journal of Korean Society for Quality Management
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• v.41 no.4
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• pp.649-657
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• 2013

Purpose: In this study, the actual situation of domestic firms vulnerable to industrial security competence will be discussed. And accordingly be discussed for effective response measures. Methods: Using a structured questionnaire by mail, fax, e-mail and fill method was used respondents. By the end of '10 R&D Center, which holds 15,247 companies(population) among the 95% level of confidence, tolerance ${\pm}3%$ p-level corporate type, sector, region extraction method stratified multi-level companies were investigated through the final 1529. Results: The average level of industrial security capabilities 43.8%(out of 100) is very weak, so urgent and positive response measures also need to be investigated sought. Conclusion: we propose the effective management framework and improvement plans to prevent illegal industrial leakage are to be made.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.1 no.1
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• pp.47-65
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• 1991

An ID-based scheme provides a very efficient solution to the key distribution problem, since it can solve bothe the authentication problem and the communication complexity problem in a public key scheme. Especilly, and ID-Based ndninterative key distribution system plays an crucial roie in the one-way communication environment such as secure electronic mail, owing to its noninteractiveness. This paper aims at analyzing the previously proposed scheme s and providing possible improvements. It also demonstraes that the Maurey-Yacobi's scheme presented in Eurocry'91 is not secure, and provikdes an countemeasure to overcome the security problem.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.800-803
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• 2013

이메일을 기반으로 좀비PC 및 봇넷그룹을 탐지하는 알고리즘은 기존에 연구가 되었으나, 기존의 검증방식은 가상의 메일계정을 이용해 스팸메일을 수집하는 스팸트랩 시스템에서 추출한 이메일을 대상으로 하였다. 본 논문에서는 상용환경의 이메일을 대상으로 좀비PC를 탐지하고, 좀비PC를 이용한 추가 사이버 공격을 예방하기 위해 기존의 알고리즘을 보완하고, 이에 대한 좀비PC 탐지결과를 분석한다. 이를 통해, 주요 포탈 및 기업의 메일서버에서 수신하는 이메일을 대상으로 좀비IP를 탐지하여, 스팸메일을 차단하고 ISP와 연계하여 실제 조치를 유도할 수 있을 것으로 기대한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.15 no.5
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• pp.35-45
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• 2005

There has recently been an increase of phishing attacks, attacks which lure users into revealing their personal information to an attacker who in turn exploits this information for economic gain. The conventional methods of fooling the user with similarly modified mail or address are constantly evolving and have diversified to include the forgery of mail or domain addresses. Recently the injury incurred by these attacks has greatly increased as attackers exploit the weaknesses found on a few web browsers and used these to conduct phishing attacks based on URL spoofing. Furthermore we are now witnessing the entrance of highly advanced phishing techniques that no longer simply rely on vulnerabilities, but employ ordinary script, HTML, DNS sniffing, and the list goes on. In this paper we first discuss means of investigating and preventing the advanced URL spoofing techniques used in phishing attacks, and then propose a scheme for fundamentally restricting them altogether.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.21 no.4
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• pp.3-10
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• 2011

To provide efficient keyword search on encrypted data, a public key encryption with keyword search (PEKS) was proposed by Boneh et al. A sender encrypts an e-mail and keywords with receiver's public key, respectively and uploads them on a server. Then a receiver generates a trapdoor of w with his secret key to search an e-mail related with some keyword w. However, Byun et al. showed that PEKS and some related schemes are not secure against keyword guessing attacks. In this paper, we propose a public key encryption with keyword search for restricted testability (PEKS-RT) scheme and show that our scheme is secure against keyword guessing attacks.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 1995.11a
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• pp.275-287
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• 1995

개인정보에 기초한 암호법은 통신자간 인증문제를 극복하고 공개 키 화일을 제거할 수 있는 방안으로 많이 연구되고 있다. Ham-Yang은 AMV 서명 기법에 기반하여 사용자 인증, 디지탈 서명과 키 분배가 가능한 개인정보에 기초한 암호법을 제시하였다. 본 논문에서는 이를 분석하고 Moon의 서명기법을 사용하여 개인정보에 기초한 사용자 인증, 디지탈 서명과 키 분배 시스템을 제안한다. 이 시스템의 안전성은 이산대수에 근거하며, 연산량과 시스템 구현 측면에서 효율적이다 대화형 간접 인증 키 분배 방식을 개선하였고 E-mail 등의 일방향 통신에 적합한 키 분배 방안을 제시한다

• Journal of the Korea Safety Management & Science
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• v.4 no.2
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• pp.135-145
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• 2002

As the Internet spreads rapidly, the industrial structure is changing to a new paradigm. The previous EDI system was asked to be changed and WEB EDI, E-Mail EDI, FTP EDI etc. based on the internet have appeared. Recently, the XML/EDI which is based on XML documents has appeared. EDI system has to assure a safe exchange between senders and receivers. But, the internet has security problems because it uses a open TCP/IP protocol. In this paper, we will propose an XML/EDI system with XML Signature.

• International Journal of Computer Science & Network Security
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• v.21 no.12
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• pp.183-188
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• 2021

The study aimed to assess the state of electronic security for the website of the Deanship of Library Affairs at Northern Border University, as one of the university's electronic portals, which provides distinguished knowledge services to faculty members, through the Saudi Digital Library, and the integrated automated system for libraries (Symphony) with the definition of cyber security of the university, and the most important threats The study sought to analyze the opinions of a wide sample of faculty members, towards evaluating the state of electronic security for the Deanship of Library Affairs portal, through the use of both the analytical method, as well as the survey, using the questionnaire tool, and the study sample consisted of 95 A faculty member of all academic categories and degrees, and university faculties, and the study concluded that it is necessary to work to overcome the relative slowness of the university's Internet, with the faculty members notifying the information security services through e-mail and SMS service, with the continuous updating of operating systems, Apply and use the latest anti-spyware, hacking, and antivirus software at the university, while conducting extensive research studies towards information security services, and contracting It aims to introduce information security risks, and ways to combat and overcome them, and spread the culture of information security among faculty members.