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A Java KeyStore (JKS) is a repository of security certificates – either authorization certificates or public key certificates – plus corresponding private keys, used for instance in TLS encryption.

In IBM WebSphere Application Server and Oracle WebLogic Server, a file with extension jks serves as a keystore.

The Java Development Kit maintains a CA keystore file named cacerts in folder jre/lib/security. JDKs provide a tool named keytool^[1] to manipulate the keystore. keytool has no functionality to extract the private key out of the keystore, but this is possible with third-party tools like jksExportKey, CERTivity,^[2] Portecle^[3] and KeyStore Explorer.^[4]

• Java Secure Socket Extension
• Keyring (cryptography)
• Public key infrastructure

• Javadoc for KeyStore

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