- Capture the Flag is a hacking competition within a controlled, safe environment. CTFs typically are made up of individual challenges that, when solved, reveal a secret key or "flag" that can be submitted to score points. They can be offensive, defensive, or both. Most CTFs last a day or two in length, however it us not unheard of for there to be long-term CTFs.
- By practicing. These links have some good resources on practice CTFs. I'd also recommend some googling and finding old write ups and some continuous CTFs that go on.
- Yes. See the calendar for specific dates. The two we'll be doing this semester are CSAW and hack.lu