Abstract
<jats:p><p><b>Cybersecurity is no longer an IT issue—it is a fiduciary responsibility.</b></p><p>The SEC’s cybersecurity disclosure rules require public companies to report material cyber incidents within four business days and disclose how boards oversee cyber risk and governance.</p><p><i>Cyberfiduciary</i> is a concise, board-level guide for directors, executives, audit committees, and legal leaders navigating this new accountability. The book translates cyber risk into governance frameworks, disclosure-ready processes, and defensible oversight—helping boards protect enterprise value, investor trust, and regulatory credibility in an increasingly digital economy.</p></jats:p>