• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 1996.11a
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• pp.11-18
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• 1996

초고속 정보 통신 기반 응용 서비스 분야 중의 하나인 전자 도서관 시스템은 많은 기술적인 요구 사항을 가지고 있다. 특히 보안 기술은 문서 서비스에 대한 사용료 지불 문제, 저작권 보호 문제 등과 밀접한 관계를 가지고 있는 쟁점 중의 하나이다. 전자 도서관에서 요구되는 보안 기술로는 문서에 대한 접근 통제 기술, 사용자 인증 기술, 문서와 사용자 데이터에 대한 비밀 보장 기능 등 여러 가지가 있다. 이 논문은 분산 환경에서 사용자 인증 기능을 제공하는 MIT Kerberos를 사용하여 전자 도서관에서 사용자 인증 기능을 제공하는 방법을 제안하였다.

• KIPS Transactions on Computer and Communication Systems
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• v.4 no.4
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• pp.141-146
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• 2015

Data have been increased enormously due to the development of IT technology such as recent smart equipments, social network services and streaming services. To meet these environments the technologies that can treat mass data have received attention, and the typical one is Hadoop. Hadoop is on the basis of open source, and it has been designed to be used at general purpose computers on the basis of Linux. To initial Hadoop nearly no security was introduced, but as the number of users increased data that need security increased and there appeared new version that introduced Kerberos and Token system in 2009. But in this method there was a problem that only one secret key can be used and access permission to blocks cannot be authenticated to each user, and there were weak points that replay attack and spoofing attack were possible. Hence, to supplement these weak points and to maintain efficiency a protocol on the basis of group key, in which users are authenticated in logical group and then this is reflected to token, is proposed in this paper. The result shows that it has solved the weak points and there is no big overhead in terms of efficiency.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 1996.11a
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• pp.346-355
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• 1996

개방형 분산 컴퓨팅 환경에 관한 표준구조인 CORBA를 기반으로 하여 CORBA에서 보안 요구사항중 사용자가 자신의 시스템에 접근하는 것과 분산되어 있는 객체에 접근하기 위한 선결조건으로 인증을 수행하는 데 필요한 인증 메커니즘으로 본 논문에서는 분산환경을 위해 개발된 Kerberos 버전5의 사용과 이률 위한 보안 인터페이스로 GSS-API를 이용함으로 CORBA 보안요구를 만족하는 보안구조를 제시하고자 한다.

• Journal of Internet Computing and Services
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• v.7 no.3
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• pp.83-91
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• 2006

In this paper, we improved a cryptography system model based on the secure initial authentication public key with PKINIT of authentication and key recovery protocol. It is applied to all fields of cryptography system using certificate. This study presents two mechanisms to authenticate between member users. The first mechanism is initial authentication and distribution of session key by public key cryptography based on certificate between entity and server, and the second mechanism is a key recovery support protocol considering loss of session key in the secure communication between application servers.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.11b
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• pp.1157-1160
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• 2003

본 논문은 웹 응용 서버 및 모바일 응용 서버 시스템을 위해 개발된 보안 프레임워크의 설계 및 구현과 관련된 내용을 다루고 있다. 본 논문에서 설명하는 보안 프레임워크는 레거시 보안 시스템과의 연동, J2EE 보안 지원, JAAS 지원, Kerberos 지원 등 응용 서버 시스템들이 요구하는 다양한 보안 기능을 제공하도록 모듈화하여 설계 개발된 것을 특징으로 한다.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.42 no.4 s.304
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• pp.25-32
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• 2005

The spread of mobile devices, PDAs and sensors has enabled the construction of ubiquitous computing environments, transforming regular physical spaces into 'Smart space' augmented with intelligence and enhanced with services. However, the deployment of this computing paradigm in real-life is disturbed by poor security, particularly, the lack of proper authentication and authorization techniques. Also, it is very important not only to find security measures but also to preserve user privacy in ubiquitous computing environments. In this Paper, we propose efficient user authentication and authorization model with anonymity for the privacy-preserving for ubiquitous computing environments. Our model is suitable for distributed environments with the computational constrained devices by using MAC-based anonymous certificate and security association token instead of using Public key encryption technique. And our Proposed Protocol is better than Kerberos system in sense of cryptographic computation processing.

• Proceedings of the Korean Information Science Society Conference
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• 2005.07a
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• pp.109-111
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• 2005

RFID 플랫폼 환경을 위한 인증 서비스를 제공하기 위해서는 동적인 분산 환경, 한 번의 인증으로 여러 서비스를 이용할 수 있어야 하고, 많은 데이터 처리와 열악한 컴퓨팅 환경에 대한 고려가 있어야 한다. 본 논문에서는 RFID 플랫폼 환경을 위한 통합 인증 모델로서 Kerberos Version 4를 이용하여 Single Sign-On 개념을 적용하고 대칭키 인증 시스템을 사용한다. 또한 단순한 권한 관리를 위해서 RBAC를 이용한 권한 관리 모델을 제시한다.

• Convergence Security Journal
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• v.14 no.2
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• pp.11-16
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• 2014

Recently, request of IPTV was increase. It is a multi-screen service by used TV, PC, and smart-phones. Especially, IPTV and smart-phone linked multi-screen service are very growth by user's recommends. Now, IPTV have a security service partial and multi-screen service. But smart-phone and multi-screen service don't have security service. And authentication service for smart-phone and IPTV linked multi-screen service is don't.. Therefore, We propose that user authentication system for multi-screen service with IPTV and multi-device linked authentcation services. Our proposed system base on Kerberos, so proposal is easy and fast about user authentication. This have simple procedures and more secure services against of PKI. So, our system can support secure multi-screen services against various security threats in multi-screen environments.

• 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.

• Convergence Security Journal
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• v.13 no.2
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• pp.155-163
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• 2013

Connection hijacking attack using the vulnerability of the TCP protocol to redirect TCP stream goes through your machine actively (Active Attack). The SKEY such as one-time password protection mechanisms that are provided by a ticket-based authentication system such as Kerberos or redirection, the attacker can bypass.Someone TCP connection if you have access on TCP packet sniffer or packet generator is very vulnerable. Sniffer to defend against attacks such as one-time passwords and token-based authentication and user identification scheme has been used. Active protection, but these methods does not sign or encrypt the data stream from sniffing passwords over insecure networks, they are still vulnerable from attacks. For many people, an active attack is very difficult and so I think the threat is low, but here to help break the illusion successful intrusion on the UNIX host, a very aggressive attack is presented. The tools available on the Internet that attempt to exploit this vulnerability, known as the recent theoretical measures is required. In this paper, we propose analysis techniques on a wireless network intruder detection.