1) It was the speed controllers for the motors which were targeted. 2) They did use home grown speed controllers (apparently). Stuxnet targeted two types of spe

1) It was the speed controllers for the motors which were targeted. 2) They did use home grown speed controllers (apparently). Stuxnet targeted two types of speed controller, one made in Finland (IIRC) and one in Tehran. 3) Undoubtedly, however the exposure of their delivery mechanism makes this much harder.