US Patent 11949784 Auditing for events

A system for auditing event data includes an interface and a processor. The interface is configured to receive an audit query request and a client key. The processor is configured to determine whether the audit query request is valid; determine whether a chain of events is stored in an audit store, wherein the chain of events is associated with the audit query request; and in response to determining that the chain of events is stored in the audit store, provide data for the audit query request.