1. Ensure they are compliant with industry standards:
Cloud service providers should be compliant with industry standards such as the International Organization for Standardization (ISO) 27001, the Payment Card Industry Data Security Standard (PCI-DSS), and the Federal Information Security Management Act (FISMA).

2. Check their data storage and access policies:
It is important to understand how the cloud service provider stores and accesses data, and if they have measures in place to protect customer data.

3. Ask about their data encryption and authentication protocols:
Cloud service providers should have data encryption and authentication protocols in place to protect data from unauthorized access.

4. Understand the cloud service provider’s disaster recovery plan:
It is important to understand how the cloud service provider plans to respond to and recover from a disaster.

5. Review their security audit and monitoring processes:
Cloud service providers should have an audit and monitoring process in place to ensure that any security incidents are identified and addressed quickly.

6. Make sure they have a vulnerability management program:
The cloud service provider should have a vulnerability management program in place to identify and address any potential security threats.

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