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Enhanced Access Control for Collaborative Documents

Enhance access control in collaborative document creation to prevent conflicting changes, support text and diagrams in real-time, and ensure confidentiality and integrity. Implement novel approaches for notification, asynchronous support, and security applications. Explore future directions in graphical evaluation of shared documents. Contact: jcampbel@umbc.edu

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Enhanced Access Control for Collaborative Documents

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  1. Enhanced Access Control for Collaborative Documents Jeffrey D. CampbellInteractive Systems Research Center Information Systems Department UMBC jcampbel@umbc.edu

  2. Introduction • Computer Supported Cooperative Work (CSCW) • Security Applications • Discussion

  3. CSCW • Collaborative Development of Documents • Text or Diagrams • Real-time What You See Is What I See

  4. CSCW Problem • Multiple people interacting with the same document can make conflicting changes • Violate social protocols • Need system support to help coordinate people • Roughly analogous to concurrency control in a database

  5. New Approach for Diagrams • System notifies users when someone acts on a shape someone else is still using • Notification can have varied results • “Still Using” determined by: • Incomplete syntax • Time, number, area, distance

  6. Asynchronous Support • Maintain list of shapes acted upon and compare divergent versions • Also supports wireless application • Particularly for syntactic rules, “in use” spans work sessions

  7. Example

  8. Security Applications • Confidentiality • Diagrams • Images • Integrity

  9. Confidentiality - Diagram • Use meaningful connections between shapes to supplement or replace traditional access control lists for the data represented by the shapes • Various levels are supported

  10. Confidentiality - Diagram Full Diagram View

  11. Confidentiality - Diagram Direct Connection to document A1

  12. Confidentiality - Diagram Only people

  13. Confidentiality - Diagram Only people and connections

  14. Confidentiality - Diagram Add A4 and see other items connected to same shape (P1) (with people and connections)

  15. Confidentiality - Diagram Add A4 and see other items directly connected to same shape (P1)

  16. Confidentiality - Diagram Add A4 and see other items connected to same shape (P1) and 1 connection

  17. Confidentiality - Diagram Add A4 and see other items connected to same shape (P1) and 2 connections

  18. Confidentiality - Image • Visible and hidden features on map • Annotations • Hidden annotations on image • Become visible after annotating same object • Could notify even if hidden

  19. Integrity • Coordination control can maintain history of actions taken • audit trail • Explicit or implicit interest areas • Notification of shared interest • Notification of intrusion (trip wire)

  20. Future Directions • Graphical evaluation of minimally different queries? • Other realistic examples? jcampbel@umbc.edu

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