• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.24 no.3
• /
• pp.499-505
• /
• 2014

According to the increasing use of smart devices such as smart phones and tablets, the service that targets mobile office, finance and e-government for convenience of usage and productivity has emerged significantly. As a result, important information is treated with the smart devices and also, the malicious activity that targets smart devices is increasing steadily. In particular, the damage case by harmful sites, malware distribution sites and phishing sites that targets smart devices has occurred steadily and it has emerged as a social issue. In the case of smart devices, the Android platform is occupied the 90% in Korea, 2013 therefore the method of device block level is required to resolve the social issues of smart devices. In this paper, we propose a method that can be effectively blocked when you try to access an illegal site to Web browser on the Android platform and develop the application and also analyze the wrong site block function.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.25 no.4
• /
• pp.829-838
• /
• 2015

As the number of smartphone users have increased, many kinds of malwares have emerged. Unlike existing malwares, spyware can be installed normally after user authentication and agreement according to security policy. For this reason, it is not easy to catch spywares involving harmful functionalities to users by using existing malware detection system. Therefore, our paper focuses on study about detecting mainly wiretapping spywares among them by developing a new wiretapping detection model and application. Specifically, this study conducts to find out power consumption on each application and modular and network consumption to detect voice wiretapping so Open Source Project Power Tutor is used to do this. The risk assessment of wiretapping is measured by gathered all power consumption data from Open Source Project Power Tutor. In addition, developed application in our study can detect at-risk wiretapping spyware through collecting and analyzing data. After we install the application to the smartphone, we collect needed data and measure it.

• Proceedings of the Korean Information Science Society Conference
• /
• 2011.06b
• /
• pp.52-54
• /
• 2011

급속하게 성장하고 있는 스마트폰 시장에서 사용자의 수가 늘어감에 따라 다양한 이슈들이 대두되고 있다. 특히 스마트폰에는 많은 개인정보들이 저장되어 있어, 분실 또는 악성 코드로 인한 정보 유출로 막대한 금전적 피해를 야기할 수 있기 때문에 보안 기법에 대한 연구 필요성이 강조되고 있다. 개방형플랫폼을 지향하고 있는 모바일 운영체제 안드로이드는 다른 폐쇄형 플랫폼보다 보안 취약점이 노출 될 가능성이 높고 실제로 이로 인한 피해 사례들이 보고되고 있다. 본 논문에서는 안드로이드를 플랫폼에서 보안을 강화하기 위해 연구된 여러 보안 기법들을 살펴보고 특징에 따라 분류해본다.

• Journal of Convergence for Information Technology
• /
• v.12 no.4
• /
• pp.126-132
• /
• 2022

At present, due to the rapid spread of smartphones and activation of IoT, malicious codes are disseminated using SNS, or intelligent intrusions such as intelligent APT and ransomware are in progress. The damage caused by the intelligent intrusion is also becoming more consequential, threatening, and emergent than the previous intrusion. Therefore, in this paper, we propose an intelligent intrusion situation-aware reasoning system to detect transgression behavior made by such intelligent malicious code. The proposed system was used to detect and respond to various intelligent intrusions at an early stage. The anticipated system is composed of an event monitor, event manager, situation manager, response manager, and database, and through close interaction between each component, it identifies the previously recognized intrusive behavior and learns about the new invasive activities. It was detected through the function to improve the performance of the inference device. In addition, it was found that the proposed system detects and responds to intelligent intrusions through the state of detecting ransomware, which is an intelligent intrusion type.

• Journal of Digital Convergence
• /
• v.12 no.10
• /
• pp.299-308
• /
• 2014

Today, a number of users using smartphone is very rapidly increasing by development of smartphone performance and providing various services. Also, they are using it for enjoying various services(cloud service, game, banking service, mobile office, etc.). today's mobile security solution is simply to detect malicious code or stay on the level of mobile device management. In particular, the services which use sensitive information, such as certificate, corporation document, personal credit card number, need the technology which are prevented from hacking and leaking it. Recently, interest of these mobile security problems are increasing, as the damage cases been occurred. To solve the problem, there is various security research such as mobile virtualization, ARM trustzone, GlobalPlatform for mobile device. Therefore, in this paper, I suggested efficient method that uses the mobile virtualization techniques of certification, security policy and access control, password/key management, safe storage, etc. and Trustzone of ARM for preventing information leakage and hacking.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2016.10a
• /
• pp.755-758
• /
• 2016

The use of smart phones has had a great impact on the mobile internet business. It shows a lot of growth in the healthcare sector not only commerce, advertising, billing, games, video content, media, amd O2O business. The United States has eased the regulations for healthcare apps smart phone devices in 2015, and China has established a five-year road map to solve shortage of doctors and hospital beds by utilizing mobile devices such as wearable in the same year. The application of wearable devices in the medical field is gradually increasing in Korea too, but there is a security problem as leading challenge. Security incidents in non-ICT sectors such as financial, medical, etc. have increased by using ICT each year. Personal information leakage is also increasing in field likely occurring the potential secondary damages such as financial fraud, illegal promotions, insurance and pharmaceutical companies abuse. In this study, we analyze malwares as the mobile threats, the five risks of mobile smart phone, mobile use cases and the mobile threat countermeasures for healthcare.

• Journal of Digital Convergence
• /
• v.12 no.1
• /
• pp.313-317
• /
• 2014

Smart-phone, PC or tablet platforms, such as smart terminals spread to the masses trying to capitalize. Smart TV also is increasing. In Korea, market size of TV is growing fast with growth of risk of hacking. In this paper, several kinds of Smart TV hacking cases are presented with the possibility of attacks against the vulnerability analysis and countermeasures. Most of the Linux operating system is open. Thus, it is vulnerable for latest hacking techniques. Most are based on the Linux OS to enhance security mount Sand-Box. However, bypass procedure using the technique, or APT attacks can avoid San-Box technique. New hacking techniques and a variety of ways will occur in the future. Therefore, this paper will develop Smart TV, and it analysis of a security threat and establishes better prepared in the future because new hacking attacks are expected to prepare more.

• Review of KIISC
• /
• v.23 no.2
• /
• pp.21-28
• /
• 2013

스마트폰의 급증 현상은 모바일 생태계의 패러다임을 변화시켰으며 다양한 SW 컨텐츠의 양산과 더불어 그 활용 영역의 확대를 가져왔다. 이에 따라 필연적으로 모바일 악성코드도 증가되고 있으며 개인정보 또는 회사 기밀정보의 무단 유출이라는 사회적 이슈도 대두되게 되었다. 이러한 문제를 해결하기 위해서는 모바일 어플리케이션에 대한 검증이 필요하고, 검증하는 방법에는 크게 정적분석 방법과 동적분석 방법이 있으며 분석 방법에 대한 자세한 내용은 선배 전문가들의 앞선 연구 사례와 논문에 몇 차례 소개된 바 있다. 이에 본 고에서는 정적분석 및 동적분석 방법을 응용하여 (주)안랩에서 실제로 운용 중인 모바일 어플리케이션의 분석 및 검증 솔루션(AMSD) 구현사례를 소개하고자 한다. 여기에는 기 알려진 정적분석 방법과 동적분석 방법에 대한 간략한 서술이 포함되어 있으며 시스템 아키텍처 정보와 실제 오픈 마켓을 대상으로 운용하면서 얻어진 앱 분석 사례 및 개선 방향도 담고 있다. 이를 통해 모바일 오픈 마켓 운영 시의 안전성과 신뢰성 확보 및 건전한 모바일 생태계 유지를 도모하는 데 조금이나마 도움이 되었으면 하는 바램이다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2015.05a
• /
• pp.703-705
• /
• 2015

정보기술환경이 모바일, 클라우드, BYOD 기반으로 변화함에 따라 과거 통화기능에만 머물던 모바일 단말은 인터넷을 활용한 전자상거래 및 모바일 오피스를 뒷받침하는 기반으로 전환되고 있다. 하지만, 단말의 분실과 도난, 악성코드 감염으로 인한 도청 및 정보유출 등의 위협이 발생하고 있으며 특히, 기업의 핵심정보가 유출되는 경로로서 활용되는 사례가 발생하여 이에 대한 조치가 시급하다. 기업은 핵심정보의 유출을 방지하기 위해 출입통제를 강화하고 스마트폰 카메라에 대한 스티커 부착을 통해 보안을 강화하고 있지만 원천적인 보호조치로는 미흡한 실정이다. 높은 수준의 보안을 유지하기 위하여 RFID, Beacon 등을 활용하여 위치기반서비스가 적용된 보안통제기능을 적용하고 위험평가기반의 출입자 보안정책을 수립하여 모바일 디바이스를 직접 통제할 수 있는 방안을 제시한다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2013.05a
• /
• pp.702-704
• /
• 2013

최근 스마트폰과 같은 모바일 기기의 확산과 SNS 의 성장이 결합되면서 사이버상의 데이터량이 기하급수적으로 증가됨에 따라 빅데이터가 화두로 등장하였으며 빅데이터는 활용방법에 따라 국가 기업 및 개인의 삶의 질을 향상 시킬수 있다. 그러나 빅데이터는 다양한 경로로 데이터를 생성하고 수집함으로서 보안에 대한 이슈가 대두되고 있다. 본 논문에서는 데이터를 생성하고 수집하는 구간에서의 보안관리를 통하여 잠재되어 있는 악성코드의 공격과 개인정보에 대한 안전성을 높이고 신뢰성있는 데이터로 만들어 활용할수 있는 방법에 대해 연구한다.