Cloud computing is becoming increasingly necessary as time goes on. The main worry is the security of cloud computing. Data security becomes a critical problem since data stored in the cloud needs to be transferred via the internet. Integrity, confidentiality, accountability, privacy, access control, authentication, and authorization are crucial data protection procedures that must be upheld. By solving its security problems, blockchain technology improves cloud computing. Blockchain technology is a distributed ledger where data are shared among various network nodes, containing transaction specifics. Consensus techniques confirm transactions, ensuring immutability once data is recorded. The required technology is Bit coin, (digital Crypto currency). Instead of using a local server or a personal computer, the method of managing, storing, and processing data in the cloud network of remote computers housed on the internet. In this post, we’ve highlighted key challenges facing the cloud and proposed solutions through the integration of blockchain technology. To underscore their effectiveness, we’ll review previous research focused on combining blockchain with cloud technology.