Amazon S3 provides encryption for data stored in the S3 buckets, which is known as sever-side encryption. The customer can encrypt their data on the user-side before uploading it to the cloud.
Sever-side encryption
On the side of AWS, AWS will encrypt the objects in the S3 when they are uploaded to the cloud, the sever-side encryption is default and always on.
User-side encryption
The user can encrypt their files before uploading them to the S3.
Back to parent node: Amazon S3
Cloud_computingAWSAWS_CLF-C02AWS_storageAmazon_S3S3_encryptionS3_securityS3_user-side_encryptionS3_sever-side_encryption
Reference* - Udemy Ultimate AWS Certified Cloud Practitioner CLF-C02