errKMSDefaultKeyAlreadyConfigured = errors.New("A default encryption already exists on KMS")
	// Additional MinIO errors for SSE-C requests.
	errObjectTampered = errors.New("The requested object was modified and may be compromised")
	// error returned when invalid encryption parameters are specified
	errInvalidEncryptionParameters     = errors.New("The encryption parameters are not applicable to this object")

			if opts.ServerSideEncryption == nil && test.encryptionType != "" {
				t.Errorf("Case %d: expected opts to be of %v encryption type", i, test.encryptionType)
			}
			if opts.ServerSideEncryption != nil && test.encryptionType != opts.ServerSideEncryption.Type() {
				t.Errorf("Case %d: expected opts to have encryption type %v but was %v ", i, test.encryptionType, opts.ServerSideEncryption.Type())
			}
		}
	}

## Acronyms

- **AEAD**: Authenticated Encryption with Associated Data
- **CSPRNG**: Cryptographically Secure Pseudo Random Number Generator
- **EK**: External Key
- **IV**: Initialization Vector
- **KEK**: Key Encryption Key
- **OEK**: Object Encryption Key
- **PRF**: Pseudo Random Function
- **SSE**: Server-Side Encryption
- **SSE-C**: Server-Side Encryption with client-provided Keys

			"X-Amz-Server-Side-Encryption":                []string{""},
			"X-Amz-Server-Side-Encryption-Aws-Kms-Key-Id": []string{""},
			"X-Amz-Server-Side-Encryption-Context":        []string{""},
		},
		Expected: true,
	}, // 4
	{
		Header: http.Header{
			"X-Amz-Server-Side-Encryption":                []string{"AES256"},
			"X-Amz-Server-Side-Encryption-Aws-Kms-Key-Id": []string{""},
		},
		Expected: true,
	}, // 5

			}
		case "Prefix":
			z.Prefix, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "Prefix")
				return
			}
		case "Encryption":
			err = z.Encryption.DecodeMsg(dc)
			if err != nil {
				err = msgp.WrapError(err, "Encryption")
				return
			}
		default:
			err = dc.Skip()
			if err != nil {
				err = msgp.WrapError(err)
				return
			}
		}
	}
	return

echo "Stat minio2/test-bucket/defpartsize"
./mc stat --no-list minio2/test-bucket/defpartsize --insecure --json
stat_out2_rep=$(./mc stat --no-list minio2/test-bucket/defpartsize --insecure --json)
rep_obj2_algo=$(echo "${stat_out2_rep}" | jq '.metadata."X-Amz-Server-Side-Encryption"')
rep_obj2_keyid=$(echo "${stat_out2_rep}" | jq '.metadata."X-Amz-Server-Side-Encryption-Aws-Kms-Key-Id"')

var validSSEReplicationHeaders = map[string]string{
	"X-Minio-Internal-Server-Side-Encryption-Sealed-Key":     "X-Minio-Replication-Server-Side-Encryption-Sealed-Key",
	"X-Minio-Internal-Server-Side-Encryption-Seal-Algorithm": "X-Minio-Replication-Server-Side-Encryption-Seal-Algorithm",
	"X-Minio-Internal-Server-Side-Encryption-Iv":             "X-Minio-Replication-Server-Side-Encryption-Iv",

			encMetadata[k] = v
		}
	}

	if (sseKMS || sseS3) && r.Encryption.Type == ssekms {
		if err = r.Encryption.Validate(); err != nil {
			return err
		}
		newKeyID = strings.TrimPrefix(r.Encryption.Key, crypto.ARNPrefix)
		newKeyContext = r.Encryption.kmsContext
	}
	if err = rotateKey(ctx, []byte{}, newKeyID, []byte{}, r.Bucket, oi.Name, encMetadata, newKeyContext); err != nil {

src_obj1_etag=$(echo "${stat_out1}" | jq '.etag')
src_obj1_size=$(echo "${stat_out1}" | jq '.size')
src_obj1_md5=$(echo "${stat_out1}" | jq '.metadata."X-Amz-Server-Side-Encryption-Customer-Key-Md5"')
echo "Stat minio1/test-bucket/defpartsize"
./mc stat --no-list minio1/test-bucket/defpartsize --enc-c "minio1/test-bucket/defpartsize=${TEST_MINIO_ENC_KEY}" --insecure --json

* Certificates have a **lifetime**.
    * They **expire**.
    * And then they need to be **renewed**, **acquired again** from the third party.
* The encryption of the connection happens at the **TCP level**.
    * That's one layer **below HTTP**.
    * So, the **certificate and encryption** handling is done **before HTTP**.
* **TCP doesn't know about "domains"**. Only about IP addresses.