Cybersecurity did not arrive fully formed. It grew in response to each new threat, and its story is best read as a sequence of eras, each defined by the dominant dangers and the defenses built to meet them. This category lays out that timeline so readers can see how today's challenges emerged from decades of change. It sits within the Foundation pillar because understanding where the field came from clarifies where it is headed.
The five eras below organize the story.
The beginnings (1970s to 1980s) saw the first experiments, including the Creeper program, the Morris worm, and the earliest antivirus tools.
The emergence of cybercrime (1990s) brought early viruses, phishing, and the first firewalls as networks went commercial.
The rise of advanced threats (2000s) introduced fast-spreading worms, botnets, and large-scale data breaches.
The era of cyberwarfare (2010s) was marked by Stuxnet, nation-state operations, and the spread of ransomware.
Modern challenges (2020s) center on supply-chain attacks, the Log4j crisis, and threats to critical infrastructure.