Moving to the cloud means an organisation relinquishes direct control and confers:

1. Security functions pass into the provider's hands. 2. The customer can no longer verify them directly. 3. An organization relinquishes direct control and confers a high level of trust onto the cloud provider. 4. So the answer is a high level of trust. _Source: NIST SP 800-144, 'Guidelines on Security and Privacy in Public Cloud Computing'_