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Research on Multilevel Security Technology for Workflow

Author: PengHuanBin
Tutor: WangYaDi；HanJiHong
School: PLA Information Engineering University
Course: Military Equipment
Keywords: Workflow BLP model RBAC TBAC EBLP model RTMLS model Petri nets
CLC: TP309
Type: Master's thesis
Year: 2009
Downloads: 21
Quote: 0
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Abstract


Workflow systems help people improve office efficiency, reduce cost, optimize workflow and ease of management advantages. Military information construction process, workflow management system has been applied to the army office. With the promotion of workflow management system, an unavoidable problem - the security issues of the workflow management system has also been more and more attention. The implementation of the multi-level security, workflow management system is an extension of the traditional workflow management system. Multilevel security workflow management system, the operator of the task, and manipulate objects are abstracted as subject and object, and its security classification. Classic BLP model proposed in 1973 by Bell and LaPadula two scholars and the amended security model in 1976. BLP model is a basis for multi-level security model, but it does not construct a functional multi-level security model. In this paper, the BLP model, combined with the security requirements of multi-level security workflow management system, improve BLP model: First, the spatial and temporal factors introduced into the BLP model, multi-level security permissions constraints of time and space; Second, The BLP model read and write permissions separation, each principal has read sensitivity and write sensitivity; Finally, the non-trusted and trusted subjects two main different extensions. Formed EBLP models based on the modification of the above ways. In EBLP model based on the combination of RBAC and TBAC, been RTMLS model. RTMLS absorb the concept of authorization template, constraints, roles, and make new interpretations and definitions; RTMLS absorption RBAC \combined EBLP multi-level security model, has a multi-level security features. Later on, the article also discusses how multi-level security based on RTMLS model workflow modeling with Petri nets. This article is based on the original workflow Petri net level Petri nets refinement, modeling tasks. Just part of the special security needs of more detailed modeling of the internal structure, does not require major modifications to the original model. Finally, a prototype system based RTMLS,. RTMLS can easily be improved on the original workflow system, multi-level security in open source under the premise of the original workflow system. The experimental data show that: the system performance declined, but this problem can be mitigated through measures to increase the cache to improve the role of setting.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality
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