Transcript Author: Markus Ylikerälä Title: Identifier/Locator Split and Group Communication with

Presentation of T-111.557, 2004-12-01
Author: Markus Ylikerälä
Title:
Identifier/Locator Split and
Group Communication with
Distributed Data Transport
Tutor:
Andrei Gurtov
Helsinki University of
Technology
MOTIVATION
• Increasing market of mobile devices
• Data sharing with peer-to-peer (P2P)
technology
• Problem: “Why would someone like to
consume his or her mobile host's
battery and pay for the use of
bandwidth for someone else?”
SOLUTION
Divide Arbitrary
Data into
Data Chunks
Distribute, Share and Assemble
Data Chunks
FRAMEWORK
FOCUS
Distributed Data Transport (DDT)
•Service offers itself to the
peergroups through the DHT
•Currently no own solution for
DHT
•Peers (mobile hosts) form
Peergroups
SECURITY, Definitions
Increasing number of mobile hosts increases malware
• Entities of DDT are behaving more or less ethical
• Ethicality of entities can differ and can be compared:
1. The more ethical are well-behaved
2. The less ethical are malicious.
• Depending from the point of the view,
behavior of the entities can be considered to be
more or less ethical.
SECURITY, Concepts
•HIP between: Peers- DHT - Service
•Sometimes imperfect security can be enough
•Malicious peers pay for data as
well-behaved peers
•The suggestion that undeterminable and
concurrent operations
increase the security of the system
SECURITY, Proposals
Assume that Service is well-behaved,
well-behaved peers can tell on malicious peers to service
service can distinct between truth and lie
•Hash of another data chunk, part of decryption key
from service, obligated data sharing among peers
•Decryption key from service after M/N
have gotten the data
•Decryption key from well-behaved peers after M/N
have gotten the data
CONCLUSIONS
•Well-behaved peers can tolerate malicious peers
•More confidental data for some service in return
•Economic perspectice for
peers, service provider, network operator
Further work:
•Further development needed for economic perspective,
confidental data, routing, security
•Implementation and experimentation
Presentation of T-111.557, 2004-12-01
Author: Markus Ylikerälä
Title:
Identifier/Locator Split and
Group Communication with
Distributed Data Transport
Tutor:
Andrei Gurtov
Helsinki University of
Technology