A third-party audit report is the most comprehensive source of information regarding the current status and effectiveness of a cloud provider's controls. A third-party audit report is an independent and objective assessment of the cloud provider's security, compliance, and performance by a qualified and reputable auditor. A third-party audit report can provide assurance to the cloud customers that the cloud provider has implemented adequate and effective controls to meet the industry standards and best practices, as well as the contractual obligations and customer expectations12.
A globally recognized certification is a credential that demonstrates that a cloud provider has met certain criteria or standards for security, quality, or performance. A globally recognized certification can provide some level of confidence to the cloud customers that the cloud provider has achieved a minimum level of compliance or competence, but it may not provide enough details or evidence about the current status and effectiveness of the cloud provider's controls3.
A control self-assessment (CSA) is a process that enables a cloud provider to evaluate its own controls internally, without involving an external auditor. A CSA can help a cloud provider to identify and address any gaps or weaknesses in its controls, as well as to monitor and improve its performance. However, a CSA may not provide sufficient assurance to the cloud customers, as it may lack objectivity, transparency, and validity4.
A maturity assessment is a process that measures the level of maturity or capability of a cloud provider's processes or practices. A maturity assessment can help a cloud provider to benchmark its performance against industry standards or best practices, as well as to identify areas for improvement or innovation. However, a maturity assessment may not provide enough information about the current status and effectiveness of the cloud provider's controls, as it may focus more on the process rather than the outcome5.
References: 1: Cloud Security Auditing: Challenges and Emerging Approaches - IEEE Journals & Magazine1 2: Cloud Security Audit: What You Need to Know | CloudHealth by VMware2 3: Cloud Security Certifications: What You Need to Know | CloudHealth by VMware3 4: Control Self-Assessment - ISACA4 5:
Maturity Assessment - ISACA