“APT” may be a catchy tune — but in the cyber world, Advanced Persistent Threats (APT) are anything but. Together with Minister Josephine Teo, I visited the Critical Infrastructure Defence Exercise (CIDeX) — where, for the first time, all 11 Critical Information Infrastructure (CII) sectors took part. Over 250 participants defended their digital systems against live simulated cyber-attacks, putting their vigilance and readiness to the test. In today’s interconnected world, a single breach can ha