@Override
    public String getSigningKeySetting() {
        return "cas.clearpass.crypto.signing.key";
    }
This is {@link CacheCredentialsCipherExecutor}.

@author Misagh Moayyed
@since 5.1.0
core/cas-server-core-authentication-api/src/main/java/org/apereo/cas/authentication/metadata/CacheCredentialsCipherExecutor.java