Over the years we’ve seen the digital security profession transformed into an overhyped and fuzzy domain that is often referred to as cybersecurity. Since many authors have written a great deal on this subject in books, journals, and social media blogs, our aim here is to enrich this field with our opinions, -viewpoints, and expertise.Thanks to a combined total of forty-five years of experience – experience from our academic back grounds as well as from our work as security and tech leaders – we are able to focus on things that should work in theory but fail in practice due to all kinds of intangible, “silent” factors.Our intention is not to be exhaustive, nor to criticize others, but to shed fresh light on crucial cyber-related allies, enemies, and issue that are rarely taken into account and talked about, but we believe you should know to help you combat the silent enemy of digital security.