Fictional Corp is trying to decide on the best way to migrate some data related to their customer database to the cloud. They are looking at multiple options. The first is a CRM platform that is a web application where the company's users can access the data through the website. The second is to develop a custom application hosted on a database instance and application platform offered through the CSP$.$ The third is to develop a custom application built out on virtual machines that the company manages. Which of the following cloud service models gives the company the least amount of control over the encryption and protection of their data?

SaaS

IaaS

PaaS

MaaS