What began as a supposed accounting error landed Cliff Stoll in the midst of database intrusions, government organizations, and the beginnings of a newer threat\u2014cyber-espionage. This led the eclectic astronomer-cum-systems administrator to create what we know today as intrusion detection. And it all began at a time when people didn\u2019t understand the importance of cybersecurity. \n\nThis is a story that many in the infosec community have already heard, but the lessons from Stoll\u2019s journey are still relevant. Katie Hafner gives us the background on this unbelievable story. Richard Bejtlich outlines the \u201choney pot\u201d that finally cracked open the international case. And Don Cavender discusses the impact of Stoll\u2019s work, and how it has inspired generations of security professionals.