• Journal of Internet Computing and Services
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• v.12 no.5
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• pp.39-46
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• 2011

The user authentication on the security applications is one of the most important process. Because character based password is commonly used for user authentication, it is most important to protect the keyboard. Due to the reason, several software solutions for keyboard security have been applied to critical sites. This paper introduces vulnerabilities to the commonly used USB keyboard, implements a sample code using the vulnerabilities and evaluates the possibility for the keyboard data to be stolen in the guarded environment. Through the comparison of the result, a countermeasure to the vulnerabilities is proposed.

• KIPS Transactions on Computer and Communication Systems
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• v.6 no.1
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• pp.17-24
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• 2017

As the prevalence of removable device, critical intelligences are often stored in the removable device. For that reason, in seizure and search, the removable device became a important evidence of while it could be has a salient key for prove a crime. When we acquired a removable device for proof, we image it by a imaging device or software with a write protection. However, these are high-priced exclusive equipments and sometimes it could be out of order. In addition, we found that some secure USB and inbuilt vaccine USB are failed to connect to the imaging device. Therefore, in this paper, we provide a suitable digital evidence collection procedure for real.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.05a
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• pp.535-538
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• 2022

For Plug & Play of IoT devices, we develop a module that recognizes the type of USB, which is a typical wired interface of IoT devices, through image recognition. In order to drive an IoT device, a driver for communication and device hardware is required. The wired interface for connecting to the IoT device is recognized by using the image obtained through the camera of smartphone shooting to recognize the corresponding communication interface. For USB, which is a most popular wired interface, types of USB are classified through artificial neural network-based machine learning. In order to secure sufficient data set of artificial neural networks, USB images are collected through the Internet, and additional image data sets are secured through image processing. In addition to the convolution neural networks, recognizers are implemented with various deep artificial neural networks, and their performance is compared and evaluated.

• Proceedings of the IEEK Conference
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• 2002.06e
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• pp.285-288
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• 2002

The match-on-token is a system which executes the user-authentication on the system using the user's biometric information. Nowadays, due to increase of request of the secure user-authentication on various parts, it comes to more use. In this paper, the match-on-token system under development by ETRI is described. The system consists of a host and an emulator board. USB is employed as the communication channel between them. First, the hooting code of the emulator board was programmed and tested in order that USB programs and the finger-print matching program can be executed correctly. Then, host programs cooperating with the board was designed, implemented and tested. Finally, future research including optimization of applications on the match-on-token will be mentioned.

• The Journal of the Korea institute of electronic communication sciences
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• v.11 no.6
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• pp.611-618
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• 2016

The suggested paper studies communications network and system technology, designing data to sync to both USB memories and cloud storages at the same time, which would allow users to safely keep and manage data even in case of network troubles, affecting cloud storages, and/or loss of physical USB memories, resulting in lost data in the physical memory. The need of secure data management policy for cloud storage users form the basis of this study, offering solutions to network failures and loss of physical storage by creating hybrid cloud system. To provide convenience to windows users, the UI design should integrate that of windows explorer to maximize security and convenience.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.10a
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• pp.155-157
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• 2018

사용자의 개인정보 및 기업의 기밀정보와 같인 데이터의 안전한 이동 및 저장을 위하여 저장장치 보안 기술이 등장하였으며, 보안 USB와 보안 디스크 제품이 대표적으로 등장하였다. 이러한 제품은 저장되는 데이터를 안전하게 보호하기 위하여 사용자 인증 기술 및 데이터 암호 기술, 접근 제어 기술 등의 보안 기술을 적용한다. 특히, 사용자 인증 기술은 비밀번호 인증 기술이 대표적으로 활용되며, 인증을 강화하기 위하여 지문 인증 및 홍체 인증이 활용되고 있다. 따라서 본 논문에서는 보안 USB 제품, 특히 B 제품을 기반으로 적용된 사용자 인증 기술을 분석하고 이를 통하여 발생 가능한 보안 취약점을 분석한다. 분석 결과, 제품 B에 적용된 비밀번호 인증에서 발생 가능한 취약점을 도출하였으며, 이를 통하여 사용자 인증을 우회하여 저장장치 내부에 저장된 데이터의 탈취 가능함을 검증하였다.

• Journal of KIISE:Computing Practices and Letters
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• v.13 no.6
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• pp.422-426
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• 2007

Personal mobile devices equipped with non-volatile storage such as MP3 player, PMP, cellular phone, and USB memory require safety for the stored data on the devices. One of the safety requirements is secure deletion, which is removing stored data completely so that the data can not be restored illegally. In this paper, we study how to design the secure deletion on Flash memory, commonly used as storage media for mobile devices. We consider two possible secure deletion policy, named zero-overwrite and garbage-collection respectively, and analyze how each policy affects the performance of Flash memory file systems. Then, we propose an adaptive file deletion scheme that exploits the merits of the two possible policies. Specifically, the proposed scheme applies the zero-overwrite policy for small files, whereas it employs the garbage-collection policy for large files. Real implementation experiments show that the scheme is not only secure but also efficient.

• The Journal of the Korea Contents Association
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• v.15 no.10
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• pp.607-615
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• 2015

Mosts user of internet and smart phone has certificate, and uses it when money transfer, stock trading, on-line shopping, etc. Mosts user stores certificate in a hard disk drive of PC, or the external storage medium. In particular, the certification agencies are encouraged for user to store certificate in external storage media such as USB memory rather than a hard disk drive. User think that the external storage medium is safe, but when it is connect to a PC, certificate may be copied easily, and can be exposed to hackers through malware or pharming site. Moreover, if a hacker knows the user's password, he can use user's certificate without restrictions. In this paper, we suggest secure management scheme of the private key file using a password of the encrypted private key file, and a USB Memory's hardware information. The private key file is protected safely even if the encrypted private key file is copied or exposed by a hacker. Also, if the password of the private key file is exposed, USB Memory's container ID, additional authentication factor keeps the private key file safe. Therefore, suggested scheme can improve the security of the external storage media for certificate.

• Convergence Security Journal
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• v.18 no.5_2
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• pp.21-27
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• 2018

Most of the Internet users in Korea are issued certificates and use them for various tasks. For this reason, it is recommended that accredited certification authorities and security related companies and use public certificates on USB memory and portable storage devices rather than on the user's desktop. Despite these efforts, the hacking of the certificate has been continuously occurring and the financial damage has been continuing. Also, for security reasons, our military has disabled USB to general military users. Therefore, this study proposes a two-factor method using the unique information of the USB memory and the PC which is owned by the user, and suggests a method of managing the private key file secure to the general user. Furthermore, it will be applied to national defense to contribute to the prevention of important data and prevention of access by unauthorized persons.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06c
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• pp.260-262
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• 2012

최근 홈 엔터테인먼트 기기에서 생성되는 대용량 멀티미디어 콘텐츠의 전송요구가 증가하면서 UWB(Ultra Wideband) 무선통신을 사용하는 WUSB(Wireless Universal Serial Bus)가 홈 네트워크의 구축을 위한 기술로 주목 받고 있다. 케이블 없이 통신하는 WUSB의 통신 환경은 호스트와 디바이스 사이에 데이터 전송 전에 반드시 서로가 원하는 정당한 상대임을 인증하는 과정이 필요하다. 하지만 기존의 호스트와 디바이스 사이에 인증과정 시 전달되는 메시지의 무결성, 도청, 프라이버시 문제 등 여러 가지 보안 위협에 쉽게 노출될 수 있는 가능성이 존재하기 때문에 안전한 인증 스킴 개발이 중요하다. 본 논문에서는 WUSB 호스트와 디바이스가 서로 인증하는 과정에서 Tamper-Resistance 메커니즘을 제공하고, 도청 위협과 Man-in-the-Middle 공격을 방지 할 수 있는 상호 인증 스킴을 제안한다.