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Mobile Systems Availability Integrity and Confidentiality MoSAIC. M.O.Killijian , D.Powell, M.Banâtre, P.Couderc, Y.Roudier LAAS-CNRS - IRISA- Eurécom. Context. 3 year project, 3 partners: LAAS, Eurécom, IRISA Officially started September 2004 Funded by French Ministry of Research

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Mobile Systems Availability Integrity and Confidentiality MoSAIC

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Mobile systems availability integrity and confidentiality mosaic
Mobile Systems Availability Integrity and Confidentiality MoSAIC

M.O.Killijian, D.Powell, M.Banâtre, P.Couderc, Y.Roudier

LAAS-CNRS - IRISA- Eurécom


Context
Context MoSAIC

  • 3 year project, 3 partners: LAAS, Eurécom, IRISA

    • Officially started September 2004

    • Funded by French Ministry of Research

  • Spontaneous Information Systems (SIS)

    • Wireless enabled PDAs

    • Mobile AdHoc Networks (MANETs)

    • Peer-to-peer model of interactions

  • New means to enforce

    • Availability

    • Confidentiality

    • Integrity

    • Privacy

Dependability

and

Security


Context1
Context MoSAIC

  • Many research works targeting the network level

    • Routing

    • Medium Access Control

  • We focus on the middleware level

    • Higher level notions/mechanisms

      • Right place for dependability mechanisms

    • Access to the application context

      • App. dependent recovery (partition/disconnection)

  • Collaborative Backup of Critical Data


Scenario
Scenario MoSAIC

Alice is going to a symposium


Scenario1
Scenario MoSAIC

Alice meets new people and colleagues


Scenario2
Scenario MoSAIC

Alice produces data and breaks her PDA


Scenario3
Scenario MoSAIC

But she gets a new PDA and is able to restore her data


Challenges for dependability
Challenges for Dependability MoSAIC

  • Intermittent access to infrastructure

  • No prior organization

  • Ephemeral interactions

  • User transparency

  • Private sensitive data

  • Limited energy, computation and storage


Goals
Goals MoSAIC

  • Design and develop

    • new mechanisms for the tolerance of

      • accidental faults

      • malicious faults

    • without usual strong assumptions

      • synchronous communication

      • global clocks

      • infrastructure

  • New middleware for dependable mobile systems


Collaborative critical data backup
Collaborative critical data backup MoSAIC

  • Issues

    • Resource allocation/discovery

    • Garbage collection of obsolete backups

    • Integrity and confidentiality of data

    • Resilience to DoS (selfishness or maliciousness)

    • Negotiation between mutually suspicious peer devices (no prior trust relationship)

  • Hints

    • Fragmentation-Redundancy-Dissemination

    • Peer-to-peer

    • Mobility for dissemination


Collaborative critical data backup1
Collaborative critical data backup MoSAIC

  • Issues

    • Resource allocation/discovery

    • Garbage collection of obsolete backups

    • Integrity and confidentiality of data

    • Resilience to DoS (selfishness or maliciousness)

    • Negotiation between mutually suspicious peer devices (no prior trust relationship)

  • Hints

    • Fragmentation-Redundancy-Dissemination

    • Peer-to-peer

    • Mobility for dissemination


Trust management for collaborative services
Trust management for collaborative services MoSAIC

  • Issues

    • No prior trust relationship

    • Protect from and identify malicious devices

    • Accountability, privacy, integrity,confidentiality

  • Hints

    • Self-carried reputation

    • Currency-based incentives

    • Hybrids


Collaborative backup for ubiquitous computing
Collaborative Backup for Ubiquitous Computing MoSAIC

  • Transparent distributed backup of critical data for mobile systems over wireless communications

    • Inspired by peer-to-peer techniques

    • Fragmentation-Redundancy-Dissemination based

  • No-prior trust relationship

    • Automated resource discovery and negotiation

    • E-cash and reputation schemes

  • Privacy

    • Tamper-proof hardware/trust core

    • Identity management (authentication, multiple IDs, etc.)



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