Factors Influencing trust / confidence in Cloud Computing include:
results of the penetration test.
no exposure of the VM sandbox in the hypervisor.
capability of the cloud computing to actually deliver the promised cloud flexing, cloud bursting, cloud load balancing, cloud apps & data portability.
capability of public cloud provider / private cloud IT team in demonstrating their disaster recovery plan & procedures.
capability of public cloud provider / private cloud IT team to demonstrate customer / company data is hosted at one agreed geographical area / non leaving the country.
agreement of public cloud provider / private cloud IT team to provide service level guarantee / SLA.
the cloud computing system can convince customers / business end users that it really provided the cloud computing five essential characteristics i.e. broad network access, rapid elasticity, measured service, on-demand self-service & resource pooling (NIST, 2011).