• Proceedings of the Korean Operations and Management Science Society Conference
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• 2006.11a
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• pp.467-481
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• 2006

In the era of the Internet and ubiquitous computing, IS users are still facing a variety of threats. Therefore, a need of more tightened information security service increases unprecedentedly. In this sense, this study is aimed at proposing a new research model in which IT assets (i.e., network, system, and information influence) and Information Security Service (i.e., confidentiality, integrity, nonrepudiation, authentication) affect information security qualty positively, leading to users' satisfaction eventually To prove the validity of the proposed research model, PLS analysis is applied with valid 177 questionnaires. Results reveal that both IT assets and Information Security Service influence informations security quality positively, and user satisfaction as well. From the results, it can be concluded that Korean government's recent orchestrated efforts to boost the IT assets and Information Security Service helped great improve the information security quality and user satisfaction.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.20 no.6
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• pp.157-169
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• 2010

As the information society changes into the ubiquitous computing society, the importance of information security has increased. Governments and enterprises are carrying out various information security activities to operate their information asset effectively. Since 2006, the Korean government has implemented 'Advance Diagnosis' policy to analyze the vulnerability of the information security from the early stage of the information system development to secure the information stability. This study proposes an analyzing framework for the economic effects of Advance Diagnosis for Information Security and presents an illustrative application em a real Advance Diagnosis case. The results of this study can be applied to secure the economic justification of government policies for the security of information systems.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.493-495
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• 2005

유비쿼터스 네트워크는 기존의 네트워크와 같이 네트워크 인프라가 구축된 상태에서 통신을 수행하는 것이 아닌 인프라가 존재하지 않은 상태에서 각 단말들 상호간의 라우팅으로 데이터 송$\cdot$수신 등의 통신 기능을 수행할 수 있는 형태의 네트워크 구조를 가지므로 유비쿼터스 컴퓨팅 환경에서 보안성을 제공한다는 것은 많은 어려움이 따른다. 본 논문에서는 프로토콜에서 기본적으로 보안성을 제공하기 위한 2가지 형태의 패킷 형태를 제시하였고, 이러한 구조를 통한 데이터 전송은 보다 빠른 데이터 처리를 수행할 수 있다.

• 한국디지털정책학회:학술대회논문집
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• 2006.12a
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• pp.387-395
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• 2006

유비쿼터스 컴퓨팅과 센서 네트워크에 대한 보안에 대한 적절한 정의가 필요하고 기존의 보안 개념인 인증, 기밀성, 무결성, 가용성과 유비쿼터스 컴퓨팅과 센서 네트워크 특성을 고려한 보안천이협약, 에너지 효율성 , 메타데이터의 기밀성 메시지와 개체에 대한 무결성, 서비스 거부 공격을 종합적으로 고려한 일반적인 유비쿼터스 컴퓨팅과 센서 네트워크 보안 환경에서 서비스를 보호하기위한 초경량 객체보호 기술에 대하여 검토하기로 한다.

• Review of KIISC
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• v.14 no.1
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• pp.21-34
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• 2004

언제, 어디서나 사용자가 접속하여 원하는 정보와 서비스를 제공받을 수 있도록 컴퓨터를 실생활 환경에 편재시키는 유비쿼터스 컴퓨팅(Ubiquitous Computing)은 차세대 컴퓨팅을 주도할 개념으로 급부상하며 많은 연구 개발이 진행되고 있다. 본 고에서는 유비쿼터스 컴퓨팅의 개요와 연구 동향 및 기술 발전 방향에 대하여 살펴본다. 또한, 유비쿼터스 컴퓨팅의 보안 요구사항을 고찰한다. 유비쿼터스 컴퓨팅의 보안 요구사항은 유비쿼터스 네트워크 환경에서의 보안요구 사항과 유비쿼터스 응용 환경에서의 보안요구 사항으로 분류하여 분석한다

• KSCI Review
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• v.14 no.2
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• pp.205-214
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• 2006

Is need Remote Access through internet for business of Ubiquitous Computing age, and apply OTP for confidentiality about inputed ID and Password, network security of integrity. Current OTP must be possessing hardware or Token, and there is limitation in security. Install a Snooping tool to OTP network in this treatise, and because using Cain, enforce ARP Cache Poisoning attack and confirm limitation by Snooping about user password. Wish to propose new system that can apply Tokenless OTP by new security way, and secure confidentiality and integrity. Do test for access control inflecting Tokenless OTP at Remote Access from outside. and could worm and do interface control with certification system in hundred. Even if encounter hacking at certification process, thing that connection is impossible without pin number that only user knows confirmed. Because becoming defense about outward flow and misuse and hacking of password when apply this result Tokenless OTP, solidify security, and evaluated by security system that heighten safety.

• Journal of the Korea Society of Computer and Information
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• v.12 no.1 s.45
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• pp.107-116
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• 2007

Is need Remote Access through internet for business of Ubiquitous Computing age, and apply OTP for confidentiality about inputed ID and Password, network security of integrity. Current OTP must be possessing hardware of Token, and there is limitation in security. Install a Snooping tool to OTP network in this treatise, and because using Cain, enforce ARP Cache poisoning attack and confirm limitation by Snooping about user password. Wish to propose new system that can apply Tokenless OTP by new security way, and secure confidentiality and integrity. Do test for access control inflecting Tokenless OTP at Remote Access from outside, and could worm and do interface control with certification system in hundred. Even if encounter hacking at certification process, thing that connection is impossible without pin number that only user knows confirmed. Because becoming defense about outward flow and misuse and hacking of password when apply this result Tokenless OTP, solidify security, and evaluated by security system that heighten safety.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.15 no.5
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• pp.59-71
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• 2005

A RFID (Radio Frequency Identification) system receives attention as the technology which can realize the ubiquitous computing environment. However, the feature of the RFID tags may bring about new threats to the security and privacy of individuals. Recently, Juels proposed the minimalist cryptography for very low-cost RFID tags, which is secure. but only under the impractical assumption such that an adversary is allowed to eavesdrop only the pre-defined number of sessions. In this paper, we propose a scheme to protect privacy for very low-cost RFID systems. The proposed protocol uses only bit-wise operations without my costly cryptographic function such as hashing, encryption which is secure which is secure against an adversary who is allowed to eavesdrop transmitted message in every session any impractical assumption. The proposed scheme also is more efficient since our scheme requires less datas as well as few number of computations than Juels's scheme.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.16 no.4
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• pp.3-12
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• 2006

RFID (Radio Frequency Identification) system is expected to play a critical role providing widespread services in the ubiquitous period. However, widespread use of RFID tags may create new threats to the privacy of individuals such as information leakage and traceability. It is difficult to solve the privacy problems because a tag has the limited computing power that is not the adequate resource to support the general encryption. Although the scheme of [2] protects the consumer privacy using an external agent, a tag should compute exponential operation needed high cost. We propose Self Re-Encryption Protocol (SREP) which provides song privacy without assisting of any external agent. Our SREP is well suitable to low-cost RFID system since it only needs multiplication and exclusive-or operation.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.22 no.1
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• pp.93-98
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• 2012

MANET composed of only moving nodes is concerned to core technology to construct ubiquitous computing environment. Also, it is a lack of security because of no middle infrastructure. So, it is necessary to intrusion detection system which can track malicious attack. In this study, cluster was used to stable intrusion detection, and rule about various attacks was defined to detect accurately attack that seems like network problem. Proposed method through experience was confirmed that stable detection rate was showed although number of nodes increase.