![](https://ams.educause.edu/eweb/upload/60154829.jpg)
Nick Hannon
Director of Information Security,
Swarthmore College
OUTCOMES: Learn ways to proactively detect compromised accounts using Haversine and IP-based geolocation data * Understand how the Haversine function can be used with geolocation data without "hard" math * Find free IP-based geolocation data sources