KEYWORDS

1. INTRODUCTION

2. SECURITY IN WSNS

3. NOTION OF TRUST

4. TRUST AND REPUTATION IN DIFFERENT DOMAINS
   4.1. Trust in Social Science and E-Commerce
   4.2. Trust in Distributed and Peer-to-Peer Systems
   4.3. Trust in Ad-hoc Networks
   4.4. Trust in Sensor Networks

5. CONCLUSION