Hello Bob, if you on 5.2.0 try the pattern below. I think, the messages ares 
misleading and should be improved. 

cas.tgc.crypto.encryption.key
cas.tgc.crypto.signing.key

Von meinem iPhone gesendet

> Am 17.08.2017 um 23:16 schrieb Bob Dill <[email protected]>:
> 
> Hi All,
> 
> I've been working for the last couple of hours trying to resolve a problem 
> I'm having with SSO. Inside the log, I'm getting the followng messages.
> 
> 2017-08-17 16:06:03,688 WARN 
> [org.apereo.cas.config.CasCoreTicketsConfiguration] - <Runtime memory is used 
> as the persistence storage for retrieving and managing tickets. Tickets that 
> are issued during runtime will be LOST upon container restarts. This MAY 
> impact SSO functionality.>
> 2017-08-17 16:06:10,889 WARN 
> [org.apereo.cas.config.JsonServiceRegistryConfiguration] - <The location of 
> service definitions [class path resource [services]] is on the classpath. It 
> is recommended that the location of service definitions be externalized to 
> allow for easier modifications and better sharing of the configuration.>
> 2017-08-17 16:06:16,959 WARN 
> [org.apereo.cas.config.CasCoreServicesConfiguration] - <Runtime memory is 
> used as the persistence storage for retrieving and persisting service 
> definitions. Changes that are made to service definitions during runtime WILL 
> be LOST upon container restarts.>
> 2017-08-17 16:06:17,627 WARN 
> [org.apereo.cas.util.cipher.BaseBinaryCipherExecutor] - <Secret key for 
> signing is not defined. CAS will attempt to auto-generate the signing key>
> 2017-08-17 16:06:17,628 WARN 
> [org.apereo.cas.util.cipher.BaseBinaryCipherExecutor] - <Generated signing 
> key 
> [3pIKmpeB_Jp8TlJjPYpztmokMosTY2KCJHmsBNUiyHTqOZptJOm5frEoObc3oYsRLdzTMAQw9Az5u9HWIsLh7A]
>  of size [512]. The generated key MUST be added to CAS settings.>
> 2017-08-17 16:06:17,629 WARN 
> [org.apereo.cas.util.cipher.BaseBinaryCipherExecutor] - <No encryption key is 
> defined. CAS will attempt to auto-generate keys>
> 2017-08-17 16:06:17,629 WARN 
> [org.apereo.cas.util.cipher.BaseBinaryCipherExecutor] - <Generated encryption 
> key [dowykNbnHjRYVswF] of size [16]. The generated key MUST be added to CAS 
> settings.>
> 2017-08-17 16:06:21,447 WARN 
> [org.apache.catalina.util.SessionIdGeneratorBase] - <Creation of SecureRandom 
> instance for session ID generation using [SHA1PRNG] took [3,730] 
> milliseconds.>
> 
> At first I was also getting a complaint about undefined keys for 
> Ticket-granting tickets, but I resolved this by setting the properties 
> cas.tgc.signingKey=<some long auto-generated value>
> cas.tgc.encryptionKey=<some long auto-generated>
> 
> I know that I can get rid of this complaint if I only knew what property to 
> set. I tried setting. 
> cas.ticket.security.encryptionKey=<generated value>
> cas.ticket.security.signingKey=<some long generated value>
> 
> Setting those properties does not seem to work, and the official 
> documentation doesn't give the property. It suggest that I look at all the 
> properties, and there are tens of keys to try. Yay!
> 
> Anyone know the property? This installation is brand new with practically no 
> customizations at this point. All I have done is added support for LDAP, and 
> JSON Service Registry to mypom.xml file.
> -- 
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> - CAS documentation website: https://apereo.github.io/cas
> - CAS project website: https://github.com/apereo/cas
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