Mobile Systems Availability Mobile Systems Availability Integrity - - PowerPoint PPT Presentation

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Mar 01, 2024 19 likes •162 views

Mobile Systems Availability Mobile Systems Availability Integrity and Confidentiality Integrity and Confidentiality MoSAIC MoSAIC M.O.Killijian, D.Powell, M.Bantre, P.Couderc, Y.Roudier LAAS-CNRS - IRISA- Eurcom Context Context 3

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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

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Context Context

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

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Context Context

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

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Scenario Scenario

Alice is going to a symposium

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Scenario Scenario

Alice meets new people and colleagues

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Scenario Scenario

Alice produces data and breaks her PDA

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Scenario Scenario

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

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Challenges for Dependability Challenges for Dependability

Intermittent access to infrastructure
No prior organization
Ephemeral interactions
User transparency
Private sensitive data
Limited energy, computation and storage

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Goals Goals

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

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Collaborative critical data backup Collaborative critical data backup

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

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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 backup Collaborative critical data backup

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Trust management for collaborative services Trust management for collaborative services

Issues
No prior trust relationship
Protect from and identify malicious devices
Accountability, privacy, integrity,confidentiality
Hints
Self-carried reputation
Currency-based incentives
Hybrids

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Collaborative Backup for Ubiquitous Computing Collaborative Backup for Ubiquitous Computing

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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Mobile Systems Availability Integrity and Confidentiality MoSAIC Mobile Systems Availability Integrity and Confidentiality MoSAIC

http://www.laas.fr/mosaic