# Cliff Stoll, Cybersecurity Pioneer, Gives Talk at DEF CON

Cliff Stoll, the astronomer-turned-sleuth famous for tracking a KGB-linked hacker in the 1980s, spoke at the DEF CON security conference. His account, chronicled in "The Cuckoo's Egg," remains a foundational story in computer security. The talk offers historical perspective from one of the field's earliest practitioners.

**Importance:** 2/5

## Sources

### Security
- [Schneier on Security](https://www.schneier.com/blog/archives/2026/09/cliff-stolls-def-con-talk.html) — Fri, 11 Sep 2026 11:09:55 +0000
- [Schneier on Security](https://www.schneier.com/blog/archives/2026/09/my-talk-at-def-con.html) — Fri, 11 Sep 2026 18:06:24 +0000