27 lines
1.4 KiB
Plaintext
27 lines
1.4 KiB
Plaintext
[role="xpack"]
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[[ciphers]]
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=== Enabling Cipher Suites for Stronger Encryption
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The TLS and SSL protocols use a cipher suite that determines the strength of
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encryption used to protect the data. You may want to increase the strength of
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encryption used when using a Oracle JVM; the IcedTea OpenJDK ships without these
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restrictions in place. This step is not required to successfully use encrypted
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communication.
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The _Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy
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Files_ enable the use of additional cipher suites for Java in a separate JAR file
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that you need to add to your Java installation. You can download this JAR file
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from Oracle's http://www.oracle.com/technetwork/java/javase/downloads/index.html[download page].
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The _JCE Unlimited Strength Jurisdiction Policy Files`_ are required for
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encryption with key lengths greater than 128 bits, such as 256-bit AES encryption.
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After installation, all cipher suites in the JCE are available for use but requires
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configuration in order to use them. To enable the use of stronger cipher suites
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with {es} {security-features}, configure the `cipher_suites` parameter. See the
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{ref}/security-settings.html#ssl-tls-settings[Configuration Parameters for TLS/SSL]
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section of this document for specific parameter information.
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NOTE: The _JCE Unlimited Strength Jurisdiction Policy Files_ must be installed
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on all nodes in the cluster to establish an improved level of encryption
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strength.
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