A list which is by no means complete, of different CTF style sites.

What is the National Missing Persons Hackathon?

The AustCyber Canberra Innovation Node has partnered with the Australian Federal Police, the National Missing Persons Coordination Centre and Trace Labs to conduct a missing person capture the flag (CTF) event (aka Hackathon) on Friday 11th October 2019. The event will see the gathering of ethical hackers and investigators using online investigative techniques within the bounds of the law to find new leads on real missing persons cases in Australia.