I was invited by NIST back in 2010 to sit on the R&D board of the interoperability panel that created the security specifications for Smart Grid (NISTIR 7628 Guidelines for Smart Grid Cyber Security v1.0 – July 2010). As part of that project, we reviewed virtually every configuration that used industrial controls in the nation’s power grid. This informed us as to what would be required to rapidly secure this national network in the face of legacy computer controls dating back more twenty years. Part of NIST’s decision to include the specifications for Immunity as part of its ultimate recommendation for securing the power grid had to do with Immunity’s lightweight client and built-in secure processes, which would enable its use in computers going back nearly twenty years.