The objective of this course is: The objective of this course is

Reputation durability

Feedback durability

Easy in a centralized or trusted environment: use a trusted third party to collect the feedbacks and return the reputation value

• Easy in a centralized or trusted environment: use a trusted third party to collect the feedbacks and return the reputation value

• More complex in decentralized environment

(Digital Ecosystems)

• (Digital Ecosystems)

• Security and Privacy

• The Personalization vs Privacy Dilemma

• Enforcing Security and Privacy

• Identity
• Location
• Accountability
• Trust
• Reputation

• Privacy-Preserving Trust and Reputation protocols

• A Proposition of Research Agenda

The fear of retaliation prevent source agents to provide their real feedback [Resnick, 2002], [ebay.com, 2008]

•