• The Transactions of the Korea Information Processing Society
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• v.5 no.7
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• pp.1801-1812
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• 1998

기존의 접근 제어 메커니즘인 강제적 접근 제어와 임의적 접근 제어는 무결성을 요구하는 상용 환경의 정보 보안에는 부족하여 이의 대안으로 직무 기반 접근 제어 (RBAC:Role Based Access Control)가 주목 받고 있으며, 직무를 수행하는 사용자의 의무 분리(Separation of Duty)에 대한 연구가 최근 이루어지고 있다. RBAC에서 사용자는 직무에 배정된 접근권한(Privilege) 만을 수행하여야 하는데 상호 배타적(Mutual exclusive)특성을 갖는 직무는 표현 및 접근 권한의 직무 배정과 수행에 있어서 어려움이 있다. 본 논문에서는 RBAC의 기본 특성을 분석하여 직무에 접근권한을 부여하고 사용자를 직무에 배정하는데 따른 안전한 접근 제어를 위하여 반순서 관계를 갖는 직무의 승계 속성에 따라 직무의 계층 형태를 분류하고, 직무에 배정되는 접근권한의 표현과 관리를 용이하게 하기 위하여 객체에 부여된 객체 접근권한을 분석하여 방향성 그래프를 이용하여 기본 접근권한으로 모델링한다. 접근권한 그래프(Privilege Graph)로 표현된 기본 접근권한에 직무를 배정하면 상호 배타적 직무의 접근권한과 의무 분리의 표현 및 관리를 용이하게 할 수 있다. 이를 기반으로 의무 분리를 포함한 RBAC의 안정성 특성과 접근권한 그래프를 이용한 직무의 의무 분리를 위한 직무 관리 알고리즘을 제시한다.

• Journal of the Korea Society of Computer and Information
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• v.15 no.12
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• pp.217-225
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• 2010

Among web-based systems being widely used now, there are so many systems which are still using an user-level access control method. By successfully applying role-based access control(RBAC) to web-based application systems, we can expect to have an effective means with reinforced security for Internet-based systems. In order to apply RBAC to web-based application systems, we should come up with a system architecture for it. I proposed a system architecture which is needed to apply RBAC to web-based application systems. The proposed system architecture is largely composed of system composition and system functioning. For details, firstly, a certificate used by RBAC is specified. Secondly, a system architecture using a user-pull method is proposed and overall system components are mentioned with a role server being centered. Then, I showed how the system architecture can work to carry out RBAC on web-based application systems. Lastly, the analyses on the proposed system architecture are described for the purpose of proving its feasibility.

• Journal of the Korea Society of Computer and Information
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• v.6 no.1
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• pp.60-66
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• 2001

We designed a role-based access control model that can resolve the complicated tasks of control requirements. The designed access control model can control permissions efficiently use of a role-based access control. It guarantees the confidentiality integrity and availa information making use of identity-based and rule-based access controls. It can also centre information flow. Our access control model protects resources from unauthorized accesses b multi-level security policies such as role, security level, integrity level and ownership.

• Convergence Security Journal
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• v.1 no.1
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• pp.1-7
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• 2001

This paper design a role-based access control model that can resolves the complicated problems of access control requirements. In this paper, we designed an access control model which can control a permission making use up role-based access control, can guard the confidentiality, integrity and availability of information and can control illegal information flow. The designed access control model can protect resources from unauthorized accesses based on the role, multi-level security policies of security level, integrity level and ownership.

• Convergence Security Journal
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• v.2 no.2
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• pp.59-66
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• 2002

The access controls are the methods which are generally used in such systems as computer operating systems, workflow systems, information security systems and etc.. In the paper, is proposed a role-based access control model which not only has fundamental security functions such as security, integrity and flow control, but also meets the access control requirements of role-based social organizations. The proposed role-based access control model is designed in order to perform its functions in simple and secure way, largely in the environment of web-based applications.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2003.12a
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• pp.538-542
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• 2003

본 논문에서는 액티브 네트워크 상에서 강력한 자원 관리와 액티브 응용의 제어를 위해 접근제어 메커니즘을 적용한 안전한 리눅스 커널을 분석 설계하였다. 설계된 접근제어 모델은 직무기반 접근제어를 이용하여 권한을 효과적으로 통제하고, 신분 및 규칙 기반 접근제어를 이용하여 정보 및 시스템의 비밀성, 무결성, 가용성의 보장 및 시스템의 불법적인 접근을 방지할 수 있다. 리눅스 마이크로 커널 기반 접근제어 모델을 직무, 보안등급, 무결성 등급 및 소유권의 다단계 보안 정책을 기반으로 시스템의 불법적인 접근, 직무기반, 소유권 등의 다단계 보안 정책을 기반으로 하여 시스템의 불법적인 접근을 통제 할 수 있다.

• Journal of the Korea Society of Computer and Information
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• v.9 no.4 s.32
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• pp.49-54
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• 2004

Rule-based access control can not completely be replaced by identity-based access control. Neither can role-based access control be a merger of identity-based access control and rule-based access control, but can be used complementarily for each other. In this paper, is proposed a simulation model designed for a new integrated access control method that has been created by means of integrating the existing access control methods. The integrated access control method is equipped with security, integrity and flow control and can easily accomodate the requirements for access control from role-based corporate bodies. The simulation model proposed in this paper can be applied for real working system designs.

• Journal of the Korea Society of Computer and Information
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• v.6 no.4
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• pp.119-124
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• 2001

In the paper, is proposed a secure role-based access control model that not only has s functions such as security, integrity and flow control, but also can easily meet access requirements of role-based social organizations. The proposed role-based access control mod designed based on proven existing rule-based access control mechanisms in order to be app real access control systems. The model proposed in the paper is simple and secure. It can be used for the web-based application systems working on the Internet.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05c
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• pp.1993-1996
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• 2003

본 논문에서는 접근 제어 메커니즘을 적응한 마이크로 커널 기반의 안전한 리눅스 커널에 대해 분석 및 설계하였다. 설계된 접근제어 보델은 역할기반 접근제어를 이용하여 권한을 효과적으로 통제하고, 신분 및 규칙기반 접근제어를 이용하여 정보 및 시스템의 비밀성, 무결성, 가용성의 보장 및 시스템의 불법적인 접근을 방지할 수 있다. 리눅스 마이크로 커널 기반 접근제어 모델을 직무, 보안등급, 무결성 등급 및 소유권의 다단계 보안 정책을 기반으로 시스템의 불법적인 접근, 직무기반. 소유권 통의 다단계 보안 정책을 기반으로 하여 시스템의 불법적인 접근을 통제 할 수 있다.

• Journal of the Korea Society of Computer and Information
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• v.9 no.3
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• pp.63-69
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• 2004

The purpose of this paper is to design a system model which is needed for integrating the secure role-based access control model into web-based application systems. For this purpose, firstly, the specific system architecture model using a user-pull method is presented. This model can be used as a design paradigm. Secondly, the practical system working model is proposed. which specifies the mechanism that performs role-based access control in the environment of web-based application systems. Finally, the comparison and analysis is shown in which the merits with the proposed system model is presented.