Complementary to the public version, private security has in the space of 30 years become an essential player in the economy. The many and varied missions it has to carry out have admittedly boosted its progress, but this rapidly growing sector is today at a crossroads. Hedged in by unauthorised competition and legal insecurity, it has got to work out, together with its partners–the State and customers–the conditions under which it can develop and guarantee its future.