The 99.999 percent cybersecurity problem

Near-perfection is a lofty goal, one utilities strive for. “Five nines” has become, it’s said, the “holy grail” of reliability: Under this scenario, customers have service 99.999 percent of the time, with outages averaging only about five minutes per year. Now, that’s service. A major telephone company set this standard, boasting of its 99.999-percent reliability. Now,[…]