Security teams once dialed blocks of telephone numbers to find modems connected to corporate systems. Internet-facing asset discovery and cloud inventories displaced the telephone-based practice.
Dial-up war-dialing operator no longer exists as a living trade. Here is what erased it, and which profession took on the work.
1960s–1980s
Access control and mainframes
Security began as controlling access to expensive shared machines. Formal models and military assurance criteria mattered more than consumer threats.
What else was happening then
1970s
Computer security criteria emerge
US defense research begins formal work on trusted systems and access controls for shared computing.
1983
WarGames makes hacking visible
The film popularises the image of a teenager reaching military systems through a modem, shaping public discussion of computer intrusion.
1988
Morris Worm spreads
Robert Tappan Morris's internet worm disrupts a substantial part of the early internet and helps spur the CERT Coordination Center.
1991
PGP brings public-key encryption to users
Phil Zimmermann releases Pretty Good Privacy, making strong encryption a public political and technical issue.
Where that work lives now
Protects systems, data and people by finding, preventing and responding to digital attacks.
🔐 Cybersecurity Specialist →