• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2004.10a
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• pp.369-372
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• 2004

유비쿼터스 환경에서는 프라이버시에 민감한 다양한 정보가 수집되고 이들이 통제되지 않은 채 배포될 수 있기 때문에 프라이버시 보호가 필수적이다. 유비쿼터스 환경에서 프라이버스 보안을 위해 사용되는 대표적인 방법론의 하나인 익명(anonymity) 기반 기법에서는, 사용자가 새로운 서비스 영역에 참여할 때 가명(pseudonym)을 사용할 수 있도록 하여, 사용자의 신분을 노출시키지 않도록 하는 방법이다. 이 방법은 사용자의 신분을 보호하는데는 효과적이지만, 친구 찾기 서비스, 위험지역경보, P2P통신 등 ID 기반의 서비스를 제공하기 어렵게 하는 단점이 있다. 이 논문에서는 익명기반의 프라이버스 보호 기법을 사용하는 유비쿼터스 환경에서 ID 기반의 서비스를 제공할 수 있도록 하는 시스템 구조를 제안한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.18 no.5
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• pp.115-124
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• 2008

In vehicular networks, vehicles should be able to authenticate each other to securely communicate with network-based infrastructure, and their locations and identifiers should not be exposed from the communication messages. however, when an accident occurs, the investigating authorities have to trace down its origin. As vehicles communicate not only with RSUs(Road Side Units) but also with other vehicles, it is important to minimize the number of communication flows among the vehicles while the communication satisfies the several security properties such as anonymity, authenticity, and traceability. In our paper, when the mutual authentication protocol is working between vehicles and RSUs, the protocol offers the traceability with privacy protection using pseudonym and MAC (Message Authentication Code) chain. And also by using MAC-chain as one-time pseudonyms, our protocol does not need a separate way to manage pseudonyms.

• Lingua Humanitatis
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• v.7
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• pp.11-30
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• 2005

Historical origins of both personal names and place names in Korea are reviewed. It is shown that names of native origin have been largely replaced by those of Sino-Korean names. Some statistics are given on the basis of the 2000 census data in South Korea. A unique method of naming personal names which contain a generation marker called hangnyol is reviewed. This enables the person to figure out one's position and others in the family tree up to as many as ten generations without going consulting the book of genealogy. While this practice had a role to play in a vertically structured society where seniority is important, it is less practiced as the society is becoming more egalitarian, so that native names, not writable in Chinese characters, are on the rise. In this global age, a person is not just a member of his family or clan, s/he is also a member of the international community. The author proposes several things that should be considered in naming to fit the modern global age: euphony of names, ambiguity, possible bad connotations when Romanized, unintended homophones with comic meanings, etc.

• The Journal of Korean Medical History
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• v.20 no.1
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• pp.112-138
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• 2007

This thesis is a study about Mai Jue Chan Wei (脈訣闡微) among many medical books by Chen Shi Duo (陳士鐸) who was a famous medical practitioner of China under the early Qing dynasty. Chen Shi Duo (陳士鐸) who is from, Shaoxing (紹興), Zhejiang (浙江) had his pen-name as Jing Zhi (敬之) and also was called as Zhu Hua Zi (朱華子) or Lian Gong (蓮公) under pseudonym of Yuan Gong (遠公). He was a medical practitioner under the early Qing dynasty in China and the date of birth and death was not for sure nor was written in the history book.

• Journal of Korea Multimedia Society
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• v.18 no.12
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• pp.1483-1491
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• 2015

Applications of Internet of Things (IoT) supply various conveniences, however unsolved security problems such as personal privacy, data manipulation cause harm to persons, even nations and an limit the applicable areas of Internet of IoT technology. Therefore, study about secure and efficient security system on IoT are required. This paper proposes ID-based remote user authentication scheme in IoT environments. Proposed scheme provides untraceability of users by using different pseudonym identities in every session and reduces the number of variables. Our proposal is secure against inside attack, smart card loss attack, user impersonation attack, server masquerading attack, online/offline password guessing attack, and so on. Therefore, this can be applied to the lightweight IoT environments.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.8 no.9
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• pp.3250-3265
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• 2014

Integrated WiMAX and WiFi networks is of great potential for the future due to the wider coverage of WiMAX and the high data transport capacity of WiFi. However, seamless and secure handover (HO) is one of the most challenging issues in this field. In this paper, we present a novel vertical HO authentication scheme with privacy preserving for WiMAX-WiFi heterogeneous networks. Our scheme uses ticket-based and pseudonym-based cryptographic methods to secure HO process and to achieve high efficiency. The formal verification by the AVISPA tool shows that the proposed scheme is secure against various malicious attacks and the simulation result indicates that it outperforms the existing schemes in terms of communication and computation cost.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10c
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• pp.496-498
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• 2002

최근 이동통신 사용자수의 증가로 각 통신사업자들은 이동 네트워크가 더욱 원활하게 동작할 수 있도록 인프라를 향상시키고, 업그레이드하고, 고도화시키는데 많은 노력을 기울이고 있다. 그러나 이러한 노력들에 비해 이동통신 사업자나 흑은 서비스 제공자들로부터 사용자의 위치정보나 이동내역정보 등과 같은 개인 프라이버시를 보호하는데 필요한 노력은 아직 미비한 실정이다. 현재까지 TP(Temporary Pseudonym) [3,4]등과 같은 사용자의 프라이버시를 보호하기 위한 여러 연구들[6,7]이 이루어지고 있으나 차세대 멀티미디어 이동통신환경에 적용하기에는 몇 가지 문제점들이 있다. 따라서 본 논문에서는 이러한 문제점들을 개선한 새로운 익명 시스템을 제안하고, 아울러 제안한 시스템의 시뮬레이션을 통하여 그 성능을 검증해보고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.763-766
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• 2015

Smart Healthcare System as an Open Platform (Shesop) is an integrated healthcare system and have several features, one of them is Steppy Application. Steppy does count your step and display on Shesop website. In this system security issues are not properly addressed, while Personal Health Record (PHR) patient stored in the cloud platform could be at risk. In fact, the huge electronic information available online, people needs reliable and effective technique for privacy preserving. In order to improve the security of data which are displayed on the Shesop website, so that anyone who access could not tamper without permission. Recently Xu et al. showed a pseudonym scheme using smart card as a solution in e-health systems which uses discrete logarithm problem with cyclic group. In this paper, we adopt their scheme and use it application into smartphone using Near Field Communication (NFC) to construct security in Steppy apps.

• Journal of Korea Society of Digital Industry and Information Management
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• v.10 no.4
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• pp.127-132
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• 2014

Some laws and regulations may require internet service providers to provide services based on the age of users. Age verification in the online environment should be used as a tool to provide service that is appropriate to child based on age. Using the minimum attribute information, processes on age verification provides the proper guidance to the internet services. However, there is a lack of a globally accepted trust framework for age verification process including evaluation factors for age verification information. In this paper the federation model of user attributes were described and evaluation factors for the age verification information were suggested. Also using the suggested evaluation factors, performance evaluation of federation model of user evaluation was performed. To meet the requirements of evaluation factors, framework of federation model should consider the unlinkability pseudonym support, eavesdropping protection and cloning protection.

• Journal of the Institute of Electronics and Information Engineers
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• v.50 no.8
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• pp.103-109
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• 2013

Mobile ad hoc networks (MANETs) are infrastructure-less and stand-alone wireless networks with dynamic topologies. To support user's safety in MANETs, fundamental and various security services should be supported. Especially in mobile commercial market, one of the major concerns regarding security is user privacy. Recently, researches about security system to protect user privacy in cluster-based MANETs have been introduced. This paper propose a cluster reconfiguration protocol under anonymous cluster-based MANETs to enhance the network stability. The improved anonymous cluster-based MANETs can recover the network structure against abnormal states of clutserheads.