  For robots acting in the presence of observers, we examine the information
that is divulged if the observer is party to the robot's plan. Privacy
constraints are specified as the stipulations on what can be inferred during
plan execution. We imagine a case in which the robot's plan is divulged
beforehand, so that the observer can use this {\em a priori} information along
with the disclosed executions. The divulged plan, which can be represented by a
procrustean graph, is shown to undermine privacy precisely to the extent that
it can eliminate action-observation sequences that will never appear in the
plan. Future work will consider how the divulged plan might be sought as the
output of a planning procedure.

Robotics