• 한국산학기술학회논문지
• /
• 제9권3호
• /
• pp.727-733
• /
• 2008

사용자가 안전한 WiBro 서비스를 받기 위해서 사용자 단말과 ACR(Access Control Router) 간에 인증이 선행되어야 한다. 그렇지 않을 경우, 많은 공격 위험으로부터 노출될 수 있다. 따라서 한국정보통신기술협회(TTA)에서는 휴대인터넷(와이브로) 서비스를 위한 상호 인증 절차 표준을 제정하였다. 이 표준 프로토콜은 PISIM(Portable Internet Subscriber Identity Module)을 이용하여 PE(Portable Equipment)와 ACR 간에 상호 인증을 수행한다. 그러나 표준은 인증에 필요한 메시지의 수가 대체적으로 많은 편이며 PISIM의 분실과 에러가 발생했을 경우에는 사용자는 무선인터넷 서비스를 사용할 수 없게 된다. 따라서 본 논문에서는 ACR과 PSS 간에 키 동의 프로토콜을 수행하여 PSS를 인증한다. 이때 PSS의 계산량을 지원하기 위한 PSD(Power Support Device)가 키 동의 프로토콜에 참여하게 된다. 이렇게 생성된 키는 ACR과 안전한 통신 세션을 맺고 있는 KAS(Key Authentication Server)에 PSS의 식별자와 키 정보를 암호화에서 저장한다. 끝으로 제안된 프로토콜의 안전성과 효율성을 분석한다.

• 산업기술연구
• /
• 제28권B호
• /
• pp.33-37
• /
• 2008

Recently, there have been intensive researches on the wireless Internet access through WiFi WLAN using WiRro network as backhaul link in the Internet service providing business area. However, in the wireless Internet access method, we need to solve the compatibility problem for different user authentications between licensed WiBro network and unlicensed WiFi network for billing and user management. In this paper, we propose an authentication method for WiFi users by BWAN operators through WiNNERs which is RS connecting the two networks, and discuss the effectiveness of the method.

• 한국정보통신설비학회:학술대회논문집
• /
• 한국정보통신설비학회 2009년도 정보통신설비 학술대회
• /
• pp.208-210
• /
• 2009

Currently, Wireless LAN(WLAN) service is widely deployed to provide high speed wireless Internet access through the mobile stations such as notebook and PDA. To provide enhanced security and user access control in the public WLAN area, WLAN access points should have the capability of IEEE 802.1x-based user authentication and authorization functionality. In this paper, we provide a brief understanding of IEEE 802.1x standards and related protocols like EAPOL(Extended Authentication Protocol Over LAN), EAP, RADIUS and describe how the IEEE 802.1x is designed and implemented in our embedded linux-based WLAN AP which is named i-WiNG. (Intelligent Wireless Internet Gateway). For the network security and user authenti -cation purposes, a supplicant who wants to access Internet should be authorized to access the AP port using the EAPOL.

• 한국멀티미디어학회논문지
• /
• 제18권12호
• /
• pp.1483-1491
• /
• 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.

• 인터넷정보학회논문지
• /
• 제9권4호
• /
• pp.69-77
• /
• 2008

X.509 인증서 확장영역에 사용자 MAC 주소를 추가함으로써 더 신뢰성 있는 사용자 인증을 제공한다. 사용자 MAC 주소를 인증서에 첨가해도 통신 퍼포먼스에 영향을 미치지 않는 것을 시연하였으며, 간단한 MAC 주소 첨가로 인해 향상된 사용자 인증을 기대한다.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제9권5호
• /
• pp.1904-1919
• /
• 2015

Deniable authentication protocol allows a sender to deny his/her involvement after the protocol run and a receiver can identify the true source of a given message. Meanwhile, the receiver has no ability to convince any third party of the fact that the message was sent by the specific sender. However, most of the proposed protocols didn't achieve confidentiality of the transmitted message. But, in some special application scenarios such as e-mail system, electronic voting and Internet negotiations, not only the property of deniable authentication but also message confidentiality are needed. To settle this problem, in this paper, we present a non-interactive identity-based deniable authenticated encryption (IBDAE) scheme using pairings. We give the security model and formal proof of the presented IBDAE scheme in the random oracle model under bilinear Diffie-Hellman (BDH) assumption.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제10권4호
• /
• pp.1864-1876
• /
• 2016

Card-Not-Present (CNP) transactions taking place remotely over the Internet are becoming more prevalent. Cardholder authentication should be provided to prevent the CNP fraud resulting from the theft of stored credit card numbers. To address the security problems associated with CNP transactions, the use of a virtual card number derived from the transaction details for the payment has been proposed, instead of the real card number. Since all of the virtual card number schemes proposed so far are based on a password shared between the cardholder and card issuer, transaction disputes due to the malicious behavior of one of the parties involved in the transaction cannot be resolved. In this paper, a new virtual card number scheme is proposed, which is associated with the cardholder's public key for signature verification. It provides strong cardholder authentication and non-repudiation of the transaction without deploying a public-key infrastructure, so that the transaction dispute can be easily resolved. The proposed scheme is analyzed in terms of its security and usability, and compared with the previously proposed schemes.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2004년도 학술대회지
• /
• pp.592-595
• /
• 2004

Recently the numbers of patent about the technology for mobile payment with Ie or bluetooth-chip are being increased more and more. The reasons of patent increment for mobile payment are advancement of wireless internet technology and rising of customer's request for it. The customer wants to be able to pay for purchase, tax and aid with own mobile phone. So every mobile service provider applies for patents about that competitively. And in the near future the biometrics is generalized in the mobile payment system. Especially the payment service of iris recognition is significant technique in this area for the future prospect. The biometrics of iris is an accurate authentication method because it has about 250 distinguish parameters to the finger print's 30. The biometrics of iris can recognize and identify a person for 2 seconds. But the image of iris is changed by transformation of body in the life. And the existing iris authentication system has problem that can be miss-recognized. In this paper, we propose the new method that reduces miss-recognizing rate with Renewable Iris Authentication Algorithm(RIAA) in mobile system.

• 한국인터넷방송통신학회논문지
• /
• 제15권4호
• /
• pp.43-53
• /
• 2015

서버-클라이언트 시스템에서 패스워드를 기반으로 하는 인증 스킴은 사용이 편리하지만, 사전 공격 및 무작위 공격에 취약하다는 단점이 있다. 이를 해결하기 위한 방법으로 암호학적으로 안전한 장문의 키를 사용할 수도 있지만, 기억하기가 어렵다는 단점이 있다. 그래서 생체정보를 이용한 인증 스킴을 Das가 처음으로 제안하여 이러한 문제를 해결하고자 했다. 하지만 Das의 인증 기법은 다양한 보안 보안취약점이 있어 이를 해결하고자 Jiping 등이 Das의 스킴을 개선하였지만 여전히 다양한 문제점이 있다. 그래서 본 논문에서 분석한 문제점을 해결한 보다 안전한 생체정보 기반의 사용자 인증 스킴을 제안한다. 그리고 보안성 분석을 통해 안전성을 검증하고 다른 스킴과 비교한다.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제7권4호
• /
• pp.923-948
• /
• 2013

The main concern in mobile peer-to-peer (P2P) networks is security because jamming or eavesdropping on a wireless link is much easier than on a wired one and such damage can be incurred without physical access or contact. In particular, authentication has increasingly become a requirement in mobile P2P environments. This paper presents a new mutual authentication mechanism which requires less storage space and maintains a high level of security in mobile P2P networks. The proposed mechanism improves efficiency by avoiding the use of centralized entities and is designed to be agile in terms of both reliability and low-cost implementation. The mechanism suggested in the simulation evaluates the function costs occurring in authentication between the devices under mobile P2P network environment comparing to existing method in terms of basic operation costs, traffic costs, communications costs, storage costs and scalability. The simulation results show that the proposed mechanism provides high authentication with low cryptography processing overhead.