Presentation of the research questions and directions of the SCORE Team

1. Score Team
• Web Scale Trustworthy Collaborative Information
Systems
Score Team – Francois Charoy March 20, 2013

2. Presentation
• Composition of the Team (March 2013)
• 10 Permanent Researchers (Professor, Associate Professor, Researcher)
• 5 PhD Students
• 5 Post-Doc
• 5 Master Students
• Web Site : score.loria.fr
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3. Objectives
• Support large scale collaboration
– between people, services and organisations
• Help to build service based application
– that can be trusted
– efficiently
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4. Scientific Questions
• Effective Optimistic replication
• Trustworthy Service Composition
• Relation to scale
– Group to Community
– Cloud
– Thousands of services
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5. Where We Stand
Design time
Business Layer
RunTime
IT Layer
Infrastructure
Layer
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6. Previous Results
• Algorithms for optimistic • Software/Platform
replication – Bonita,
• Collaborative systems – Libresource,
– Qualipso Factory,
• BPM models
– DSMW, Etc.
• Service composition
Verification
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7. The project
Collaborative data
management
Data centric service
composition
Trustworthy collaborative
systems
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8. Collaborative Data Management
• Collaboration, distributed
in time, space and
organisations
Business Layer
• Collaborate without a Collaborative Editing
central authority
IT Layer
Optimistic replication
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9. Optimistic Replication
• Investigate and evaluate new algorithms
– Operational Transformation
– CRDT
• Support for decentralized « Real Time »
Collaborative Systems
• Understand their behaviour
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10. Experiment algorithms
• How do they behave
– With real users,
– With a lot of users
– With different scenarios
– With different deployment
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11. First Results
• Executing the same input
with different algorithms
• But we need more input
• On going work
– In the Cloud
– With real users
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12. Concurrent editing generate conflicts
• How to detect conflicts
• How to solve conflicts
• How to avoid conflicts
• How to respect privacy
• How to enforce privacy
rules
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13. Collaborative editing conflicts
Several people correcting the same document
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14. Optimistic data sharing control
• Sharing contract
• Trust representation
• Audit log
• Updated trust value
based on audit
• Authenticators for
securing logs
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15. Coordination in dynamic situation
Business Layer
Design time
Dynamic Process
RunTime
Management
IT Layer
Governance Aware
Optimistic Replication
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16. Coordination in dynamic situation
Application to crisis management
• Issues
– Changing goals
– No central authority
– Privacy/governance issues
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17. A Replicated Activity Model
• Design time = Execution
time
• Temporal dependencies
• P2P Sharing
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18. Data Centric Service Composition
• Development of applications at the scale of the web
• How to develop services that are
– Efficient, Safe, Secure, Flexible, Adaptative
• How to ensure/enforce some properties on service
composition
– Transactional properties, Security properties,
Privacy/Quality of service
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19. Our landscape evolves quickly
• The web as a platform
– To collaborate
– To produce and share data
– To produce and deliver services
• Elastic Computing
– P2P
– Cloud Infrastructure

20. The scale is changing
• Regarding data production
– Wikipedia
– Climate Change Report
• Regarding coordination
– Crisis Management
• For both
– OSS development

21. Open services are here

22. Heterogeneity is back again

23. New ecosystems have appeared
• Smartphone and tablet
apps
• They are based on
services (REST API)

24. Our landscape evolves quickly
• The Web as a Platform
– To collaborate
– To share data
– To deliver services
• Elastic Computing
– P2P
– Cloud Infrastructure
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25. Engineering Service Composition
• Designing the
composition (What, How)
• Defining the contracts
Business Layer
• Verifying the contracts Modeling/Specifying/Checking
• Deploying/executing
• Monitoring/Auditing IT Layer
Deployment/Execution
• Responding to contract
violation
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26. Declarative Service Composition
Composition
Design
Composition Composition
Closing the loop Implementation
Monitoring
is a challenge & Validation
Composition
Execution
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27. Model driven service engineering
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28. Advanced BPM
• Collaborative Business Process
• Large Scale Business Process
• Orchestration of Open Services
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29. Trustworthy Collaborative Systems
• Collaborative system : composition of collaborative systems
• Define the confidence attributes
– Trust and/or Control
– Certification
• Confidence is a relation
– Service/Service
– User/User
– User/Service
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30. An approach grounded on contract
• Confidence contracts in collaborative environments
– Between participants
– Between services
– Between users and the environment
• Validation of contracts and of their composition
• A posteriori contracts verification
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31. Example : Trust and Data Sharing
• Can we build application based on data services in
the Cloud ?
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32. Scientific challenges
• Identify confidence attributes for services
• Monitor, control, validation of contracts
• Matching between confidence and applications
Optimistic approach for safety and
security in a large scale setting
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33. Thank you !
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