Cloud deployment models define how cloud infrastructure is organized, owned, managed, and delivered to users. These models determine the level of control, flexibility, security, and cost-efficiency available to organizations while deploying applications and storing data in cloud environments. The four primary cloud deployment models are public cloud, private cloud, hybrid cloud, and community cloud, each designed to meet different operational and security requirements within cloud and infrastructure security frameworks. The public cloud deployment model refers to cloud services delivered over the public internet and shared among multiple organizations or tenants. In this model, cloud service providers such as Amazon Web Services, Microsoft Azure, and Google Cloud manage the infrastructure, hardware, and maintenance tasks. Users can access resources on demand without investing in physical infrastructure. Public clouds offer scalability, cost efficiency, and flexibility through pay-as-you-go pricing models. From a security perspective, the provider is responsible for securing the underlying infrastructure, while customers must secure their data, identities, and applications under the shared responsibility model. Despite strong provider-level security measures such as encryption, firewalls, and intrusion detection systems, concerns about data privacy, multi-tenancy risks, and compliance requirements remain significant challenges for sensitive