1 Welcome Hans Andersson Der Yao Leong Yee Jiun Song Wendy Tobagus Yang Bei Sherif Yousef

2 iSecurity Project Team

3 Overview Background Background Vision and Goals Accomplishments Future Work Summary

4 Background iSecurity Project – Joint project between KTH and Stanford University – Security in an interactive environment iSpace project – To create an international network of usable augmented environments for collaborative, project-driven learning and working iRoom & iLoungeiLounge

5 Motivation The iSpace project was conceived in an academic environment Security issues have not been a high priority However, security is essential for widespread deployment

6 Video

7 Security Requirements Security is a very important issue in Interactive Workspaces Our security system ensures privacy and integrity Convenience, customizability, accessibility and accountability are also ensured by our security system

8 Overview Background Vision and Goals Vision and Goals Accomplishments Future Work Summary

9 Vision and Goals Our vision is to deliver a non-intrusive and robust security system for interactive environments Social model Technically feasible system design Implementation Auditing tools Testing and evaluation

10 Overview Background Vision and Goals Accomplishments Accomplishments Future Work Summary

11 Accomplishments Social Model Technical Design Implementation Auditing and Logging Tools Evaluation

12 Social Model Specify the nature of security in Interactive workspaces Enumerate the objectives of the model Define the mechanisms by which these objectives are accomplished.

13 Ubicomp Security Transparent, open and dynamic environment – Users and devices interacting spontaneously and in an ad hoc fashion Different security concerns compared to traditional computer environment

14 Social Model Objectives Integrity Privacy Availability Accountability Customizability Convenience

15 Security Mechanisms Gatekeeper Trust Groups – Implicit Trust Groups – Explicit Trust Groups Security Policy Definition – Permissions – Owners – Delegation Authentication Privacy Guarantee Enforcement

16 Technical Design Map the ideas of the social model into a technical design that can be implemented Specify the parts of the system and how they interact with each other Specify authentication and security mechanisms Clear system and interface specifications, to allow application design to proceed concurrently

17 Secure Event Heap A new secure Event Heap, built on top of the existing event heap server Users are required to log into the system All events are checked by the security module before they are sent or received All events can be traced back to a particular user Programmatic support for the development of secure applications

18 System Architecture Event Heap

19 Implementation Implemented our design using Java SSL and crypto packages, and added security checking elements into Event Heap Achieved: – Backwards compatibility – Secure communication – Permission management iRoom now uses the secure version of Event Heap – all original applications run fine No major problem

20 Auditing and Logging Tools Administrator should have the option of logging all activity Provides traceability of security breaches Adapted a logging tool originally written by Andy Szybalski Allows recording as well as browsing of logs, also provides filtering capabilities

21 Logging Tool

22 Sample Applications iPaint – Allows the sharing of a virtual whiteboard – All authenticated users can draw on it Secure File Share – Allows the sharing of files – Three kinds of permissions (list, download, upload)

23 iPaint

24 Secure File Share

25 Permission Manager

26 Evaluation No detailed evaluation with real users Internal evaluation Useful security system that is easy to use More studies will be needed to determine if our system fully meet users’ needs

27 Overview Background Vision and Goals Accomplishments Future Work Future Work Summary

28 Future Work Performance improvement Flow Control Graphical User Interface Automatic monitoring and log-analysis tools

29 Overview Background Vision and Goals Accomplishments Future Work Summary Summary

30 Summary iSpace infrastructure lacks security Ubicomp security issues are unique Our iSecurity system provides a non- intrusive, robust security system for users System provides strong privacy and integrity guarantees for users Rich area for future research work

31 Questions For further information about this project please visit our homepage: