Transcript Reputation systems

Reputation systems
Jaime Pérez <[email protected]>
Reputation
1. The estimation in which one is held; the
character attributed to a person, thing, or
action;
Aims:
• Develop new architectures and services
based on reputation systems.
• Enhance existing services by adding the
concept of reputation.
• Find different, efficient ways of representing
and using reputation.
Examples:
• Spam fighting: use reputation as an
indicator to include IP addresses into
white/black lists.
• Efficient use of the network: use reputation
in peer-to-peer networks to avoid misuse.
White/black listing
• People include IPs in the white list.
• Periodic automated checks to move IPs
between lists.
• The white list is used to purge the black list.
• The black list is checked by the MTAs by
querying a DNS zone.
• Binary reputation!
Reputation in P2P
• The behaviour of the peers is monitored.
• The reputation of a peer is used to decide
whether to share something with him or not.
• Based on federation technology to identify
peers and track their reputation.
Open Reputation Management
Systems
• OASIS Technical Committee
• Focused on reputation technologies.
• Working on terminology and use cases.
Work items
• Start sharing white/black lists
automated way (federation?).
in
an
• Start a pilot of a P2P based on reputation
technology.
• …