• TTA Journal
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• s.106
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• pp.30-37
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• 2006

지능형 서비스 로봇 분야에서는 확대된 기능과 지능화된 정보를 제공하고 로봇과 인간 사이에 상호작용에 의한 자율성을 제공함으로써 더 고급화된 양질의 서비스와 함께 응용분야와 시장이 크게 확대될 것으로 주목받게 되었다. 지능형 서비스 로봇에서는 지능을 구현할 소프트웨어의 알고리즘 개발이 장기적인 과제로 남아 있음에도 불구하고 지능형 서비스 로봇과 소프트 인프라웨어와의 컨버전스는 로봇의 발전을 급속히 앞당겨주며 새로운 시장창출에 크게 기여를 할 것이다. 이를 위하여 선행되어야 할 표준화가 시급하다. 또한 국제 소프트웨어 기술의 도입, 소프트웨어 설계수준의 제고와 인증 관련한 표준화 이슈를 다룬다. 본문에서는 이와 관련하여 로봇과 소프트 인프라웨어의 컨버전스를 이루기 위한 표준화 이슈를 기술한다.

• Journal of Internet Computing and Services
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• v.9 no.2
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• pp.83-88
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• 2008

Session initiation protocol (SIP) is an application-layer prolocol to initiate and control multimedia client session. When client ask to use a SIP service, they need to be authenticated in order to get service from the server. Authentication in a SIP application is the process in which a client agent present credentials to another SIP element to establish a session or be granted access to the network service. In 2005, Yang et al. proposed a key exchange and authentication scheme for use in SIP applications, which is based on the Diffie-Hellman protocol. But, Yang et al.'s scheme is not suitable for the hardware-limited client and severs, since it requires the protocol participant to perform significant amount of computations (i.e., four modular exponentiations). Based on this observation. Huang and Wei have recently proposed a new efficient key exchange and authentication scheme thor improves on Yang et al.'s scheme. As for security, Huang and Wei claimed, among others, that their scheme is resistant to offline dictionary attacks. However, the claim turned out to be untrue. In this paper, we show thor Huang and Wei's key exchange and authentication scheme is vulnerable to on offline dictionary attack and forward secrecy.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.3C
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• pp.426-435
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• 2004

The DIAMETER protocol provides Authentication, Authorization, and Accounting (AAA) transactions across the Internet. SIP(Session Initiation Protocol) will be used for new types of signaling, such as instant messaging and application level mobility across networks. And SIP will be a major signaling protocol for next generation wireless networks. But the Digest authentication scheme is not using a secure method of user authentication in SIP, and it is vulnerable to man-in-the-middle attacks or dictionary attacks. This study focused on designing a SIP proxy for interworking with AAA server with respect to user authentication and security analysis. We compared and analyzed the security aspects of the scenarios and propose two proposals that a response which include the user address and password-based mutual authentication and key agreement protocol. It is claimed to be more secure against common attacks than current scenarios.

• Journal of Digital Convergence
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• v.12 no.4
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• pp.285-291
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• 2014

Recent, development of wireless communication devices are rapidly and these device being deployed to the user very fast. By this results, a wired network device and the new device such as wireless devices incorporate. Then a demand of new mesh network is rapidly growing. In this wired/wireless integrated network environment, the network is configured automatically, and a user or wireless communication devices must be provided for authentication services. But, these services do not in the real world. Therefore, in this paper, we propose that wired/wireless integrated network environment to automatically configure the network using OpenFlow and the authentication system using Kerberos method. Our proposed system to be able to provide authentication services, confidentiality, integrity services for user or wired/wireless communication devices. And it can be prvented as well to man-in-the-middle attacks.

• Review of KIISC
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• v.6 no.2
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• pp.21-34
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• 1996

계약이나 송금 등을 행하는 서비스에서 서명은 없어서는 안되는 중요한 요소이며 특히 전자 우편(electronic mail), MHS(Message Handling System)나 EDI(Electronic Data Interchange) 서비스는 기업체는 물론 일반 사용자에게까지 널리 이용될 것으로 사료된다. 이러한 서비스의 특징은 통신망상에서 메시지를 이용하여 다양한 형태의 서비스를 제공하기 때문에 메시지 자체에 대한 인증이나 송신자, 수신자 상호 쌍방간에 인증, 부인 봉쇄 기능을 갖추는 것은 분쟁을 해결하는 필수 불가결한 요소이다. 이를 위한 기술적 대책이 디지틀 서명이다. 디지틀 서명 기술은 기존의 종이 문서에서 사용되는 수서명을 대신할 수 있는 것으로 메시지의 출처와 메시지의 진위 여부를 확인할 수 있는 매우 유용한 서명 방식이다. 그러나, 사실상 디지틀 서명이 많은 응용 업무에서 활용될 것은 자명한 사실이므로 적용 환경 및 적용 업무에 따라서 여러 가지 추가적인 요구조건이 등장할 수 있다. 이러한 특수한 디지틀 서명 프로토콜에 관한 연구는 매우 가치 있는 연구 분야이다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.7
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• pp.1411-1419
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• 2017

The two factor authentication capability, private key possession and key protection password knowledge, and the strong public key cryptography protocol of PKI authentication have largely contributed to the rapid construction of Internet transaction trusted infrastructure. The reusability of a certificate-based identity for every PKI site was another contribution factor of the spread of PKI authentication. Nevertheless, the PKI authentication has been criticised mainly for the cost of PKI construction, inconvenience of individual certificate management, and difficulties of password management. Recently FIDO authentication has received high attention as an alternative of the PKI authentication. The FIDO authentication is also based on the public key cryptography which provides strong authentication services, but it does not require individual certificate issuance and provides user-friendly and secure authentication services by integrating biometric technologies. The purpose of this paper is to concretely compare the PKI-authentication and FIDO-authentication and, based on the analysis result, to propose their corresponding applications.

• Annual Conference of KIPS
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• 2002.04b
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• pp.861-864
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• 2002

인터넷 이용 확산과 휴대용 단말기 사용자의 증가로 무선 인터넷 서비스의 수요가 증대되고 있는 가운데 많은 응용 서비스들이 제공되고 있다. 이러한 서비스의 제공에 있어 특히, 기밀성과 인증성 그리고 안전성이 보장되어야 하며, 계산량 및 통신량에 있어 효율성이 높아야 할 것이다. 본 논문에서는 무선인터넷 서비스 제공을 고려하여 사용자 요구에 빠른 응답을 제공하고 휴대용 단말기의 계산 부담을 줄일 수 있는 타원곡선을 이용한 proxy-signcryption 방식을 제안한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37C no.11
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• pp.1027-1035
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• 2012

Recently, the smart phone including web and mobile service based on the reliability and extendability of cloud computing is receiving huge attention. However, most of current cloud services provide just an application service for synchronizing data between mobile entity and server. Business model developed by communication companies have problems with interoperability. This paper proposes a new service security authentication model to efficiently manage smart phone users using different business models between smartphones and to keep the reliability and extendability of cloud computing. Proposed model authenticates for smart phone users to stay with in the unified communication with smart phone user's identity and access control to effectively use the current cloud computing system.

• Journal of Broadcast Engineering
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• v.13 no.4
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• pp.528-543
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• 2008

Internet Protocol Television (IPTV) provides an interactive and personalized service for realizing integrated broadcasting and telecommunication services. Set-top box (SIB) connected to TV is an essential component required for IPTV and has a unique hardware identifier used in identification and authentication. It means that subscriber authentication based on box-level identification is inconsistent with IPTV's main intention of providing personalized services. The proposed solution is to provide an opportunity to use the flexible user-centric authentication mechanism through Java Card applets in IPTV application server and 3G networks. This paper suggests personalized services by moving the user's private data and authentication management beyond the STB to a truly personalized device, the ubiquitous mobile phone. In addition, this paper presents effectiveness and security analysis for verifying the proposal.

• Annual Conference of KIPS
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• 2023.05a
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• pp.250-252
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• 2023

본 논문에서는 인터넷으로 블록체인 플랫폼 및 서비스를 제공하는 BaaS 환경에서 IAM 서비스를 이용한 개인정보 보호 시스템을 설계했다. 서비스 사용자는 API를 통해 클라우드에 데이터를 요청하는데, 사용자와 클라우드 사이에 API 미들웨어를 두어 클라우드 데이터에 직접 접근하지 못하도록 한다. 또한, 미들웨어의 역할을 하는 서버는 IAM(Identity & Access Management) 서비스에서 생성한 역할 및 정책, 권한에 따라 허가된 데이터에만 접근하며 사용자의 데이터 요청 전/후로 인증 절차를 진행해 시스템의 기밀성 및 무결성을 만족할 수 있도록 한다.