IPTPS '01 Revised Papers from the First International Workshop on Peer-to-Peer Systems
CLOUD '10 Proceedings of the 2010 IEEE 3rd International Conference on Cloud Computing
Trusted Cloud Computing with Secure Resources and Data Coloring
IEEE Internet Computing
Trust as a service: a framework for trust management in cloud environments
WISE'11 Proceedings of the 12th international conference on Web information system engineering
TrustCloud: A Framework for Accountability and Trust in Cloud Computing
SERVICES '11 Proceedings of the 2011 IEEE World Congress on Services
Towards a Trust Management System for Cloud Computing
TRUSTCOM '11 Proceedings of the 2011IEEE 10th International Conference on Trust, Security and Privacy in Computing and Communications
Security Challenges for the Public Cloud
IEEE Internet Computing
Credibility-Based trust management for services in cloud environments
ICSOC'11 Proceedings of the 9th international conference on Service-Oriented Computing
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Cloud service consumers' feedback is a good source to assess the trustworthiness of cloud services. However, it is not unusual that a trust management system experiences malicious behaviors from its users. Although several techniques have been proposed to address trust management in cloud environments, the issue of how to detect occasional reputation attacks on cloud services is still largely overlooked. In this paper, we introduce an occasional attacks detection model that recognizes misleading trust feedbacks from occasional collusion and Sybil attacks and adjusts trust results for cloud services that have been affected by these malicious behaviors. We have collected a large collection of consumer's trust feedbacks given on real-world cloud services (over ten thousand records) to evaluate and demonstrate the applicability of our approach and show the capability of detecting such malicious behaviors.