OT Security Tier 4 NIST Cybersecurity Framework June 28, 2018 by arpit The days when ICS networks were isolated, air-gapped networks running specialized proprietary hardware and software are long gone. Critical infrastructure ICS networks have evolved rapidly in the past few years and now use numerous IP devices that connect to the internet to allow connectivity, remote access management and significant improvements in operational efficiency. But all […] Read more » Critical infrastructure NIST NIST Cybersecurity Framework OT security