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Optimistic Access Control for Collaborative Applications
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Author(s): Asma Cherif (Umm Al-Qura University, Saudi Arabia)and Abdessamad Imine (Lorraine University, France & Inria Nancy Grand-Est, France)
Copyright: 2016
Pages: 34
Source title:
Innovative Solutions for Access Control Management
Source Author(s)/Editor(s): Ahmad Kamran Malik (COMSATS Institute of Information Technology, Pakistan), Adeel Anjum (COMSATS Institute of Information Technology, Pakistan)and Basit Raza (COMSATS Institute of Information Technology, Pakistan)
DOI: 10.4018/978-1-5225-0448-1.ch005
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Abstract
Collaborative applications are important applications, allowing users to cooperate in order to perform a given task. Their importance has grown significantly over the recent years since they are required in many fields. However, they still lack of an appropriate access control mechanism which limits their full potential. It is hard to conceive an access control model for collaborative applications since they need to change dynamically access rights while maintaining high local responsiveness. This chapter presents a decentralized access control model based on replicating the shared document and its access control policy at each collaborating site. The interaction between document updates and authorizations updates is carefully studied to maintain the convergence of the shared data. Our model relies on an optimistic approach to enforce the access control, i.e. users may temporarily violate the access control policy if their rights were revoked concurrently. Illegal operations are undone selectively to eliminate their effects and converge to the same final state of the shared object.
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