In cloud security, the
shared responsibility model defines what the CSP secures vs. the customer. The split depends on service model (IaaS/PaaS/SaaS) — but customers always own their data and identities.
"Not my responsibility" = data breaches. Even in SaaS, the customer is responsible for: data, access management, user behavior, client-side security. Misunderstanding shared responsibility is the #1 cause of cloud security failures.