Systems, methods, and machine-readable media are disclosed to provide for auditing of events or access of resources in a distributed system. In one embodiment, auditing access of resources can comprise receiving from a client a request to access one or more of the resources. A sign-on identifier can...http://www.google.com.hk/patents/US8141138?utm_source=gb-gplus-share專利 US8141138 - Auditing correlated events using a secure web single sign-on login