The infrastructure and ideas of the computers of the future are based on cloud computing. A shift towards cloud-based architecture is happening quickly in the world's computer infrastructure. While expanding cloud computing's applications to other industries is crucial, concerns about data security in the cloud should not be overlooked. A new business trend centred on cloud technology has emerged as a result of the evolution of cloud-based services and service providers. Now that there are so many cloud services offered by widely scattered cloud providers, sensitive data belonging to various entities is often kept on distant servers, which leaves them vulnerable to intrusion in the event that those servers are hacked. The reliability and adaptability of cloud computing would be severely compromised in the absence of strong and consistent security measures. In this article, we will take a look at the fundamentals of cloud computing and the security concerns that come with it.