Cloud Security Alliance Certificate of Cloud Security Knowledge
The CCSK from the Cloud Security Alliance is one of the most widespread vendor-neutral cloud security certifications worldwide. It is based on three core sources: the CSA Security Guidance v4, the ENISA Cloud Computing Risk Assessment, and the CSA Cloud Controls Matrix (CCM). The exam is fully online and open-book — this lowers the entry barrier but also means less practical proof than e.g. CCSP. No professional experience required, no expiration date. Good as an entry point into cloud security and as preparation for the CCSP, but not a strong career building block on its own.