  This paper, deals with the linear infinite dimensional distributed parameter
systems in a Hilbert space where the dynamics of the system is governed by
strongly continuous semi-groups. More precisely, for parabolic distributed
systems the characterizations of regional boundary strategic sensors have been
discussed and analyzed in different cases of regional boundary observability in
infinite time interval. Furthermore, the results so obtained are applied in
two-dimensional systems and the sensors are studied under which conditions
guarantee regional boundary observability in a sub-region of the system domain
boundary. Also, the authors show that, the existence of a given sensor for the
diffusion system is not strategic in the usual sense, but it may be regional
boundary strategic of this system.
