Final answer:
In SSE-C encryption, the client retains control over the encryption key.
Step-by-step explanation:
In the case of SSE-C encryption, the client retains control over the encryption key. SSE-C stands for Server-Side Encryption with Customer-Provided Keys, which means that the encryption key is generated and managed by the client. The encryption and decryption of data are performed by the AWS S3 service using the client-provided key.