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황유동(YuDong Hwang),신동욱(DongUk Sin),박동규(DongGue Park) 한국정보기술학회 2005 Proceedings of KIIT Conference Vol.2005 No.-
인터넷과 웹이 활성화되고, 모바일 환경의 발전으로 사용자는 문서, 디렉토리, 데이터베이스, 웹 페이지 등과 같은 자원들을 위치와 시간에 관계없이 액세스하는 것이 훨씬 더 쉬워졌다. 그러나 이로 인하여 네트워크의 인증, 자원들을 액세스하기 위한 권한의 허가, 보안 시스템의 무결성과 같은 중대한 보안 문제들이 생기게 되었다. 본 논문에서는 시간(기간과 주기)에 따른 자원 사용의 제한, 상위 역할로의 제한적인 권한 상속, 정교한 위임 정책을 제공하고, 사용자의 위지 정보를 추가로 고려한 모바일 기업 환경을 위한 동적 접근제어 모델을 적용하여 모바일 환경에서 자원의 사용을 제한 할 수 있는 새로운 무선 권한 관리 기반 구조를 제안한다. With the wide acceptance of the Internet and the Web, volumes of information and related users have increased and companies have become to need security mechanisms to effectively protect important information for business activities and security problems have become increasingly difficult. This paper proposes a new WPMI(Wireless Privilege Management Infrastructure) for access control enforcement in mobile enterprise environments through the integration of the temporal constraint character, restricted inheritance, exquisiteness delegation and location constraint character.
황유동(Hwang Yudong),이유리(Lee Youri),박동규(Dong-Gue Park),신용녀(Yong-Nyuo Shin),김재성(Kim Jason) 한국정보보호학회 2007 情報保護學會誌 Vol.17 No.5
언제 어디서나 예방, 진단, 치료, 사후 관리의 보건 의료 서비스를 제공하는 Ubiquitous-Healthcar(U-HC)는 최근 초보적인 단계로 IT 기술과 의료 시스템이 결합된 원격 또는 재택 진료 시스템이 선을 보이고 있다. 하지만 원격 의료 시스템의 개인 신상 및 바이오 유출은 환자의 프라이버시 침해의 가능성을 내포하고 있다. 따라서 본고에서는 원격 의료 정보 시스템의 인증을 강화하기 위하여 Telebiometrics X.tsm 과 X.tai 표준을 기반으로 하는 바이오 인식 기반 원격 의료 정보 시스템의 사용자 인증 모델의 예를 제시하고 Telebiometrics의 X.tpp를 기반으로 시스템에서 발생 할 수 있는 취약성 및 위협을 분석한다.
다단계 보안통제가 가능한 확장된 과업-역할 기반 접근제어 모델
황유동(YuDong Hwang),박동규(DongGue Park),임황빈(HwangBin Yim) 한국정보기술학회 2004 한국정보기술학회논문지 Vol.2 No.1
In this paper, Multi-Level Extended Task Role-Based Access Control(ML-ETRBAC) Model is proposed for access control enforcement in enterprise environments by adding multi security level for users, roles, tasks and objects in the Task Role-Based Access Control model. The ML-ETRBAC Model proposed in this thesis, can provide multi-level security control, apply to tasks in workflow environment, deal with conflicting entities to classification of session and support a exact duty separation's policy for tasks. The safety and applicability for the proposed model was proved by presenting formal specifications & verification and the effectiveness of it was verified by applying it to enterprise environments.
황유동(YuDong Hwang),박동규(DongGue Park) 한국정보기술학회 2005 한국정보기술학회논문지 Vol.3 No.1
With the wide acceptance of the Internet and the Web, volumes of information and related users have increased and companies have become to need security mechanisms to effectively protect important information for business activities and security problems have become increasingly difficult. This paper proposes a improved access control model for access control enforcement in enterprise environments through the integration of the temporal constraint character of the GT-RBAC model and PBDM(Permission Based Delegation Model) concept. The proposed model in this paper supports user-user delegation, role-role delegation. multi-step delegation, multiple delegation and temporal delegation in GT-RBAC model by appling FDBR(Fixed Delegatable Roles), TDBR(Temporal Delegatable Roles), DTR(Delegation Roles) concepts to it in order to enable fine grained access control in enterprise environments.
황유동(Yudong Hwang),박동규(Donggue Park),장종수(Jongsoo Jang) 한국정보기술학회 2005 한국정보기술학회논문지 Vol.3 No.6
The Study transfer images to frequency domain using the wavelet transform and inserted watermark of chaos sequence to apply the threshold value in frequency space hard to search. Inserting parts of watermark are high frequency component strong in change brightness or contract and are low frequency component strong in image change same to compress, noise, scaling and etc. Detection of watermark utilize the difference between original and changed image, and used stochastic access method for proprietary rights certification. propriety of the proposed watermark method demonstrated.
홈 네트워크 환경에서 신뢰할 수 있는 서비스를 위한 디바이스 인증 프로토콜
이정환(Junghwan Lee),황유동(Yudong Hwang),박동규(Donggue Park),한종욱(Jongyook Han) 한국정보기술학회 2005 한국정보기술학회논문지 Vol.3 No.6
The future home network environment is changed into the integrated system which is to coexist with various networks and services. However, the existing techniques for the home network are not allowed to interoperability because each of them is independent entity based on each consortium. Accordingly device authentication should be processed for the interoperability of many kinds of devices and secure home services. Therefore, this paper examines the existing techniques and suggests the new device certificate and new device authorization protocol using it and home server.
Temporal constraints를 고려한 GEO-RBAC 모델
신동욱(Dongwook Shin),황유동(YuDong Hwang),박동규(DongGue Park) 한국정보기술학회 2006 한국정보기술학회논문지 Vol.4 No.6
Developing context awareness service In these day, It demands high security in context awareness service. So GEO-RBAC that provide user assignment of spatial role, assignment of permission, role schema, role instance and spatial role hierarchy to context awareness service is access control model to perfect in context awareness service. But GEO-RBAC is not considering temporal constraints that have to need context awareness environment. Consequently this paper improves the flexibleness of GEO-RBAC to consider time and period constraints notion and the time of GTRBAC that presents effective access control model. also we propose GEO-RBAC to consider temporal constraints for effective access control despite a various case.