cinder/cinder/tests/functional/api_sample_tests/samples/volume_type/encryption-type-create-response.json.tpl

{
    "encryption": {
        "volume_type_id": "%(uuid)s",
        "control_location": "front-end",
        "encryption_id": "%(uuid)s",
        "key_size": 128,
        "provider": "luks",
        "cipher": "aes-xts-plain64"
    }
}