Cloud computing is rapidly expanding, and businesses are seeking for ways to store their data in the cloud. Cloud security has evolved into a diversified sector, with cloud companies competing furiously to deliver the highest level of protection to their customers. The goal of this article is to discuss the various strategies used by cloud providers to provide data encryption on their clouds, as well as to compare the encryption algorithms employed by these well-known cloud providers. We also attempt to explain the widely used encryption algorithm Advanced Encryption Standard (AES) in the cloud provider sector. This article includes Homomorphic Encryption, which is a type of encryption employed by many cloud providers to allow the user to analyze and manipulate the data without the need to decrypt the data. Homomorphic Encryption, which is utilized by a number of cloud companies to protect data.