Policy-driven role-based access management for ad-hoc collaboration

Gail-Joon Ahn, Jing Jin, Mohamed Shehab

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Ad-hoc collaboration is a newly emerged environment enabling distributed collaborators to share resources. The dynamic nature and unique sharing pattern in ad-hoc collaboration poses great challenges for security services to accommodate both access control and trust management requirements in providing controlled resource sharing. In this paper, we propose a comprehensive, integrated and implemented access management framework, called RAMARS, for secure digital information sharing in ad-hoc collaboration. Our framework incorporates a role-based approach to leverage the originator control, delegation and dissemination control. A trust awareness feature is integrated for dynamic user-role assignment based on user attributes. The access control polices are formally specified, and a peer-to-peer scientific information sharing system - ShareEnabler - is presented to demonstrate the feasibility of our approach. The performance evaluation of our prototype system with potential system improvements is also discussed.

Original languageEnglish (US)
Pages (from-to)223-257
Number of pages35
JournalJournal of Computer Security
Issue number2-3
StatePublished - Jul 3 2012


  • Ad-hoc collaboration
  • access management
  • policy enforcement
  • security architecture

ASJC Scopus subject areas

  • Software
  • Safety, Risk, Reliability and Quality
  • Hardware and Architecture
  • Computer Networks and Communications


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