DCE provides security for distributed applications and it also provides secure access into and between DCE services. In this case, DCE security services cannot directly improve the native client workstation base security capabilities. The answer is no. Generally speaking, yes.
Many initial customers are in the financial and banking industries.
This is a known requirement for inclusion into the base DCE protocols. We are investigating the technology and approaches. No commitment now. See OSF RFCs 57.0, 57.1, and 71.0. Yes, they are atomic when performed but the unit of change is small.