From the draft paper's conclusion:
We investigated the PA3 backdoor problem through Internet searches, software and hardware analysis and found that this particular backdoor is not a result of any mistake or an innocent bug, but is instead a deliberately inserted and well thought-through backdoor that is crafted into, and part of, the PA3 security system. We analysed other Microsemi/Actel products and found they all have the same deliberate backdoor. Those products include, but are not limited to: Igloo, Fusion and Smartfusion. The PA3 is heavily marketed to the military and industry and resides in some very sensitive and critical products. From Google searches alone we have found that the PA3 is used in military products such as weapons, guidance, flight control, networking and communications. In industry it is used in nuclear power plants, power distribution, aerospace, aviation, public transport and automotive products.