context.setKeyRotationBytesLimit(100); // Rotate after 100 bytes

        // Encrypt first message - should work
        byte[] plaintext1 = "Message before rotation".getBytes();
        byte[] encrypted1 = assertDoesNotThrow(() -> context.encryptMessage(plaintext1, 1L));
        assertNotNull(encrypted1);

        // Encrypt larger message to trigger rotation
        byte[] largeMessage = new byte[150]; // Exceed 100 byte limit

It is not very popular or used nowadays.

OAuth2 doesn't specify how to encrypt the communication, it expects you to have your application served with HTTPS.

/// tip

In the section about **deployment** you will see how to set up HTTPS for free, using Traefik and Let's Encrypt.

///

## OpenID Connect { #openid-connect }

            if (plaintextBytes != null) {
                SecureKeyManager.secureWipe(plaintextBytes);
            }
        }
    }

    /**
     * Encrypt credentials to a base64 string for storage
     *
     * @param plaintext the credentials to encrypt
     * @return base64 encoded encrypted credentials
     * @throws GeneralSecurityException if encryption fails
     */

# specific language governing permissions and limitations
# under the License.

# -----------------------------------------------------------------------------
# Apache Maven Encrypt Script
#
# Environment Variable Prerequisites
#
#   JAVA_HOME           (Optional) Points to a Java installation.
#   MAVEN_OPTS          (Optional) Java runtime options used when Maven is executed.

# specific language governing permissions and limitations
# under the License.

# -----------------------------------------------------------------------------
# Apache Maven Encrypt Script
#
# Environment Variable Prerequisites
#
#   JAVA_HOME           (Optional) Points to a Java installation.
#   MAVEN_OPTS          (Optional) Java runtime options used when Maven is executed.

TLS Termination Proxyとして使えるオプションには、以下のようなものがあります：

* Traefik（証明書の更新も対応）
* Caddy (証明書の更新も対応)
* Nginx
* HAProxy


## Let's Encrypt { #lets-encrypt }

Let's Encrypt以前は、これらの**HTTPS証明書**は信頼できる第三者によって販売されていました。

これらの証明書を取得するための手続きは面倒で、かなりの書類を必要とし、証明書はかなり高価なものでした。

しかしその後、**[Let's Encrypt](https://letsencrypt.org/)** が作られました。

@REM specific language governing permissions and limitations
@REM under the License.

@REM -----------------------------------------------------------------------------
@REM Apache Maven Encrypt Script
@REM
@REM Environment Variable Prerequisites
@REM
@REM   JAVA_HOME           (Optional) Points to a Java installation.
@REM   MAVEN_BATCH_ECHO    (Optional) Set to 'on' to enable the echoing of the batch commands.

	start_port=$1

	export MINIO_ROOT_USER=minio
	export MINIO_ROOT_PASSWORD=minio123
	export MC_HOST_minio="http://minio:minio123@127.0.0.1:${start_port}/"
	unset MINIO_KMS_AUTO_ENCRYPTION # do not auto-encrypt objects
	export MINIO_CI_CD=1

	MC_BUILD_DIR="mc-$RANDOM"
	if ! git clone --quiet https://github.com/minio/mc "$MC_BUILD_DIR"; then
		echo "failed to download https://github.com/minio/mc"
		purge "${MC_BUILD_DIR}"

	// the MinIO-internal key derivation.
	MetaIV = "X-Minio-Internal-Server-Side-Encryption-Iv"

	// MetaAlgorithm is the algorithm used to derive internal keys
	// and encrypt the objects.
	MetaAlgorithm = "X-Minio-Internal-Server-Side-Encryption-Seal-Algorithm"

	// MetaSealedKeySSEC is the sealed object encryption key in case of SSE-C.

    eu6FSqdQgPCnXEqULl8FmTxSQeDNtGPPAUO6nIPcj2A781q0tHuu2guQOHXvgR1m
    0vdXcDazv/wor3ElhVsT/h5/WrQ8
    -----END CERTIFICATE-----
    """.trimIndent().decodeCertificatePem()

  // CN=Let's Encrypt Authority X3, O=Let's Encrypt, C=US
  val letsEncryptCertificateAuthority =
    """
    -----BEGIN CERTIFICATE-----
    MIIEkjCCA3qgAwIBAgIQCgFBQgAAAVOFc2oLheynCDANBgkqhkiG9w0BAQsFADA/