AWS Technical Essentials Practice

AWS Key Management Service (KMS) enhances data security by providing encryption both at rest and in transit. Encryption at rest ensures that the data stored in AWS services is encoded and requires proper decryption keys to access, protecting it from unauthorized access even if physical storage media is compromised. On the other hand, encryption in transit secures the data as it moves between services or to and from end-users, preventing interception or eavesdropping during transfer.

The dual-layer protection of encryption at rest and in transit means that sensitive information remains secure throughout its lifecycle in the cloud. This capability is critical for businesses that need to comply with various regulations regarding data protection and privacy, as it helps to ensure that data remains confidential and integral.

Other options do not directly enhance data security in the same way. While compressing data before storage can optimize storage usage, it does not secure the data. Faster access to data might improve performance but doesn't inherently relate to data security. Automatic backups are important for data recovery but don't provide encryption or secure the data itself.