• Proceedings of the Korea Information Processing Society Conference
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• 2002.11b
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• pp.881-884
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• 2002

Kerberos 시스템은 MIT에서 Athena 프로젝트의 일환으로 개발된 인증 시스템으로 인증되지 않은 사용자들의 불법 접속을 방지하고, 인증된 사용자에게 서비스 이용 권한을 제공하려는 목적을 가지고 있다. 이 시스템은 인증 서버(AS: Authentication Server)와 티켓 승인 서버(TGS: Ticket Granting Server) 그리고 서비스 제공 서버(SPS; Service Provide Server)로 구성된다. 사용자는 서비스 제공 서버와 관용 암호 알고리즘에 사용할 비밀키를 공유하고, 이를 이용하여 서비스를 제공받는다. 본 논문에서는 키 복구 기능과 향상된 인증 서비스를 제공하는 Kerberos 시스템을 제안한다. 제안하는 시스템은 사용자와 서비스 제공 서버간에 키 분배를 수행하고, 서비스 제공 서버는 분배된 키를 이용하여 서비스를 제공한다. 이때 분배된 키는 사용자의 요청에 따라 인증 서버와 티켓-승인 서버에 의해 복구될 수 있다.

• Journal of the Korea Computer Industry Society
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• v.3 no.5
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• pp.641-652
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• 2002

In this paper, proposes Kerberos certification mechanism that improve certification service of PKINIT base that announce in IETF CAT Working Group. Bid to certificate other realm because search position of outside realm through DNS and apply X.509 directory certification system, acquire public key from DNS server by chain (CertPath) between realms by certification and Key exchange way that provide service between realms applying X.509, DS/DNS of PKINIT base. In order to provide regional services, Certification and key exchange between realms use Kerberos symmetric method and Session connection used Directory service to connection X.509 is designed using an asymmetric method. By efficient TGT (Ticket Granting Ticket) exchange and reusability of ticket, A Design of Kerberos system that have effect and simplification of certification formality that reduce overload on communication.

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2005.11a
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• pp.281-284
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• 2005

Kerberos is system that offer authorization in internet and authentication service. Can speak that put each server between client and user in distributed environment and is security system of symmetry height encryption base that offer authentication base mutually. Kerberos authentication is based entirely on the knowledge of passwords that are stored on the Kerberos Server. A user proves her identity to the Kerberos Server by demonstrating Knowledge of the key. The fact that the Kerberos Server has access to the user's decrypted password is a rwsult of the fact that Kerberos does not use public key cryptogrphy. It is a serious disadvantage of the Kerbercs System. The Server must be physically secure to prevent an attacker from stealing the Kerberos Server and learning all of the user passwords. Kerberos was designend so that the server can be stateless. The Kerberos Server simply answers requests from users and issues tickets. This study focused on designing a SIP procy for interworking with AAA server with respect to user authentication and Kerberos System. Kerberos is security system of encryption base that offer certification function mutually between client application element and server application element in distributed network environment. Kerberos provides service necessary to control whether is going to approve also so that certain client may access to certain server. This paper does Credit-Control Server's function in AAA system of Diameter base so that can include Accounting information that is connected to Rating inside certification information message in Rating process with Kerberos system.