Encryption is the process of transforming data into an unreadable format using a secret key or algorithm. Encryption is the best way to address the requirement of data confidentiality, as it ensures that only authorized parties can access and understand the data, while unauthorized parties cannot. Encryption can protect data at rest, in transit, and in use, which are the three possible states of data in cloud computing environments. Encryption can also help comply with various regulations and standards that require data protection, such as GDPR, HIPAA, or PCI DSS.