Not only is the cost of cyber intrusion severe, the likelihood of it occurring is assured. Cybersecurity defenses must be flexible, innovative and persistent to address an ever-changing threat.
A cycle of measures, countermeasures and counter-countermeasures is necessary, and if you do nothing else, you must remain flexible, advises Rear Adm. Jay Cohen, USN (Ret.), principal, The Chertoff Group. There is no silver bullet to protect everything, he emphasizes.