A certificate revocation list is a directory which contains a list of certificates that have been revoked for various reasons. Certificates may be revoked due to improper issuance, compromise of the certificate, and failure to adhere to policy. Therefore, any certificate found on a CRL should not be trusted. Permitting execution of an applet published with a revoked certificate may result in spoofing, malware, system modification, invasion of privacy, and denial of service. NOTE: The 'JRE' directory in the file path may reflect the specific JRE release installed.

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Enable the 'Check certificates for revocation using Certificate Revocation Lists (CRL)' option. Navigate to the 'deployment.properties' file for Java, the default location is /usr/java/jre/lib/deployment.properties Add or update the 'deployment.security.validation.crl' key. Set the value to 'true'.