1. In a computing environment, a method for synchronizing a set of password credentials between a source service and a target service, the set of password credentials enabling access to each of the source service and the target service, the method comprising: providing, by a processor, a synchronization time stamp that corresponds to a last password credential synchronization between the source service and the target service; receiving a hashed set of changed password credentials, the hashed set of changed password credentials including only changes made to the set of password credentials since the last password credential synchronization; and exporting the hashed set of changed password credentials to the target service for use in identity authentication.