1. A method for implementing hardware security in an integrated circuit device comprising: obtaining an integrated circuit device comprising a security circuit defining a first electrical function and formed with at least one or more operatively inert high-k metal gate transistors of a first polarity type having a work function metal layer of a second, opposite polarity type, where, if the one or more operatively inert high-k metal gate transistors were instead fabricated as operatively functional high-k metal gate transistors of the first polarity type with a work function metal layer of the first polarity type, the security circuit would define a second different electrical function.