• The Transactions of the Korea Information Processing Society
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• v.5 no.4
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• pp.967-974
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• 1998

Access control scheme of the firewall systems protects the systems from threats by using the conventional discretionary access control mechanism. The discretionary access control mechanism is insufficient to control secure information flow on the multievel network. Thus, it is necessary to provide the mandatory access control mechanism to the firewall systems for the multilevel security environment. In this paper, we present a design scheme of the security mechanisms concerning the sensitivity label and the mandatory access control for securely processing the multilevel information.

• Journal of The Korean Association of Information Education
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• v.1 no.2
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• pp.57-66
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• 1997

The primary purpose of security mechanisms in a computer systems is to control the access to information. There are two types of access control mechanisms to be used typically. One is discretionary access control(DAC) and another is mandatory access control(MAC). In this study an access control mechanism is introduced for secure access path in security system. The security policy of this access control is that no disclosure of information and no unauthorized modification of information. To make this access control correspond to security policy, we introduce three properties; read, write and create.

• Journal of the Korea Society of Computer and Information
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• v.10 no.1 s.33
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• pp.141-148
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• 2005

Nowadays, it is possible to access sharing data from unauthorized People. Access control prevents unauthorized access to computing resource, information resources, and communication resources. It is very important to defend the critical system resources from the unauthorized. The importance of this study is to develop Protection Profile for Mandatory Access Control (MAC) that satisfies TCSEC assurance level B2. protection profile for MAC will help developers to use reference for the development of requirements and formulating security specification.

• Journal of Information Processing Systems
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• v.17 no.4
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• pp.834-850
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• 2021

IT security companies have been releasing file system filter driver security solutions based on the whitelist, which are being used by several enterprises in the relevant industries. However, in February 2019, a whitelist vulnerability was discovered in Microsoft Edge browser, which allows malicious code to be executed unknown to users. If a hacker had inserted a program that executed malicious code into the whitelist, it would have resulted in considerable damage. File system filter driver security solutions based on the whitelist are discretionary access control (DAC) models. Hence, the whitelist is vulnerable because it only considers the target subject to be accessed, without taking into account the access rights of the file target object. In this study, we propose an industrial device security system for Windows to address this vulnerability, which improves the security of the security policy by determining not only the access rights of the subject but also those of the object through the application of the mandatory access control (MAC) policy in the Windows industrial operating system. The access control method does not base the security policy on the whitelist; instead, by investigating the setting of the security policy not only for the subject but also the object, we propose a method that provides improved stability, compared to the conventional whitelist method.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.7 no.3
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• pp.117-128
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• 1997

When computer systems with mandatory access control mechanism are interconnected each other for enforcing the MHS(Message Handling System) security on the multilevel secure distributed network environment, illegal information flow may occurs due to the unexpected cascade vulnerability problem. In this paper, new MHS security policy and security property functions are proposed for preventing the cascade vulnerability.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.27 no.1
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• pp.49-57
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• 2017

With the prevalence of mobile devices, many organizations introduce MDM BYOD and try to increase the level of security with them. However, device control of mobile devices in application level cannot be a solution against the fundamental problems. In this paper, we propose a more flexible and more secure method to control the hardware devices using Linux Security Module in the kernel level with the mandatory access control.

• The Journal of Information Systems
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• v.14 no.3
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• pp.1-8
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• 2005

This paper formally defines a role-driven security and access control model of a business process in order eventually to provide a theoretical basis for realizing the secured business process management systems. That is, we propose a graphical representation and formal description of the mechanism that generates a set of role-driven security and access control models from a business process modeled by the information control net(ICN) modeling methodology that is a typical business process modeling approach for defining and specifying business processes. Based upon the mechanism, we are able to design and accomplish a secured business process management system that provides an unified resource access control mechanism of the business process management engine domain's and the application domain's. Finally, we strongly believe that the secured access control policies from the role-driven security and access control model can be easily transformed into the RBAC(Role-based Access Control) model that is a standardized security technology for computer and communications systems of commercial and civilian government organizations.

• Journal of the Korea Convergence Society
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• v.7 no.1
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• pp.1-8
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• 2016

Cloud computing technology offers function that share each other computer resource, software and infra structure based on network. Virtualization is a very useful technology for operation efficiency of enterprise's server and reducing cost, but it can be target of new security threat when it is used without considering security. This paper proposes access control mechanism based on MAC(Mandatory Access Control) for cloud convergence that solve various problem that can occur in cloud environment. This mechanism is composed of set of state rules, security characteristics and algorithm. Also, we prove that the machine system with access control mechanism and an initial secure state is a secure system. This policy module of mechanism is expected to not only provide the maintenance but also provide secure resource sharing between virtual machines.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.15 no.3
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• pp.13-29
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• 2005

An important characteristic of role-based access control model(RBAC) is that by itself it is policy neutral. This means RBAC articulates security policy without embodying particular security policy. Because of this reason, there are several researches to configure RBAC to enforce traditional mandatory access control(MAC) policy and discretionary access control(DAC) policy. Specifically, to simulate MAC using RBAC several researches configure a few RBAC components(user, role, role-hierarchy, user-role assignment and session) for keeping no-read-up rule and no-write-down rule ensuring one-direction information flow from low security level to high security level. We show these researches does not ensure confidentiality. In addition, we show the fact that these researches overlook violation of integrity due to some constraints of keeping confidentiality. In this paper we propose a RBAC model satisfying both confidentiality and integrity. We reexamine a few RBAC components and constructs additional constraints.

• Convergence Security Journal
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• v.8 no.3
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• pp.25-31
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• 2008

SELinux, security operating system, is the security system which implements mandatory access control using linux security module on the traditional linux kernel supporting discretionary access control. But intrusion detection and logging are lacked when system intrusions are happened. This study proposes a SELinux security kernel which performs detection of access violation and privilege restriction using dynamic access control. It detects the intrusion using security check when the abnormal access of system is happened, and dynamically changes the system privilege for the intruder through privilege restriction. Finally we prevent reintrusion and explain the result of experiment.