A novel trust model for unreliable public clouds based on domain partition

摘要

Cloud computing has become an important scientific computing and commercial application paradigm. There are many computing resources and data in public clouds, but there exist some threats caused by unreliable services due to malicious providers or unacceptably poor service performance. Traditional trust computing requires a high overhead and thus decreases the performance of a cloud system. To address such issues, this work proposes a trust model by adopting trust certificate authority to compute domain trust and global trust. The model decreases computational complexity based on domain partition. Sliding-windows are used to obtain updated trust values. Experimental results show that the proposed trust model can achieve efficient and accurate trust computation.