IBM Research and the U.S. Department of Defense teamed to determine if governmental high assurance practices could be applied to commercially available network computers. The focus of the project was on using the thin client computing architecture to connect to trusted information domains of different classification levels at different times. Importantly, the information from a given classified domain must not migrate from its domain. Achieving this goal requires state clearing, and encrypting and authenticating all transferred data between the thin client and the trusted domain.