MinIO AIStor implements Transport Layer Security (TLS) 1.2+ encryption with support for Server Name Indication (SNI) for selecting relevant TLS certificates in response to client requests. You must set up TLS before you can enable data encryption, also called server-side encryption. MinIO AIStor supports the following types of certificate signatures: self-signed internal or private certificate authorities (CAs) third-party CAs Multiple certificates are implemented with SNI to determine which certificate to return to a client based on the hostname in the request.