Securing S3 objects at rest and in transit

In the previous section, you learned about bucket default encryption, which is completely different from object-level encryption. Buckets are not encrypted, whereas objects are. A question may arise here: what is the default bucket encryption? You will learn these concepts in this section. Data during transmission can be protected by using Secure Socket Layer (SSL) or Transport Layer Security (TLS) for the transfer of HTTPS requests. The next step is to protect the data, where the authorized person can encode and decode the data.

It is possible to have different encryption settings on different objects in the same bucket. S3 supports Client-Side Encryption (CSE) and Server-Side Encryption (SSE) for objects at rest:

• CSE: A client uploads the object to S3 via the S3 endpoint. In CSE, the data is encrypted by the client before uploading to S3. Although the transit between the user and the S3 endpoint happens in an encrypted channel...