  The finite field dependent BRST (FFBRST) technique generally interrelates two
different gauge fixed theories. Here we propose a new and unique FFBRST
transformation that transforms the effective theory in Lorenz gauge, which
represents perturbative or deconfined phase of QCD to massive gauge theory. The
exercise serves two purposes. First is of course that it is a distinct
connection where one of the theories is not gauge fixed and BRST invariant
therefore, it is expected to give newer insights into FFBRST technique itself.
Second is that a particular case of this transformation holds a novel physical
significance of acting as general mechanism for confinement across two
different gauge theories. Thus, the present task identifies a profound
non-perturbative implication of the BRST symmetry in a general setting.
