0ed2c426_3____The_ClusterManager_object__Attribute
[Description] Name of the algorithm to use to create the java.security.SecureRandom instances that generate session IDs. If an invalid algorithm and/or provider is specified, the Manager will use the platform default provider and the default algorithm. If not specified, the default algorithm of SHA1PRNG will be used. If the default algorithm is not supported, the platform default will be used. To specify that the platform default should be used, do not set the secureRandomProvider attribute and set this attribute to the empty string. [Attribute] 
secureRandomAlgorithm
Apache Tomcat 7 Configuration Reference (7.0.63) - The ClusterManager object