TKCTF

Info

The last lab of the class is a 24-hour Capture The Flag (CTF) with challenges from various topics of the class. Teams of students will compete in the competition and earn points for lab 10.

The CTF will last from April 24, 3:00 pm EST until April 25, 3:00 pm EST.

Teams

Each team has 3 to 4 players.

Please sign up your team here. We will send you login details closer to the CTF.

For the competition, we recommend that you create a team chat where you can easily communicate. Voice chat and screen sharing may be very helpful when you work on challenges together.

Scoring

The details of the scoring may be subject to change!

1. CTF scoring

The score in the CTF consists of attack points. This is NOT your actual class score – see the next section.

  • Attack score: up to 500 points for each solved challenge

    • Dynamic scoring decreases the points per challenge as more teams solve it

    • The minimum score for each challenge is 250 (50%)

2. Translation of CTF score to class score

The class score is calculated as the sum of base points and ranking points.

  • Base points:

    • 20 points, awarded for solving at least one challenge

  • Ranking points:

    • First-place team, which scored X CTF points, gets 380 ranking points. - “First-place team” might be either per-section or overall, depending on how many online-section/external teams participate.

    • Other teams, which scored Y CTF points, get 380 * Y/X ranking points.

In other words, the first-place team gets 400 class points, and everyone else’s CTF scores will be scaled linearly, with a minimum of 20.

Example: Team A scored 1500 points in the CTF, Team B scored 2000 points and wins the competition. Thus, Team B gets 400 class points: 20 base points + 380 ranking points. Team A also gets 20 base points. In addition, they get (1500/2000)*380=300 ranking points (linear scaling). Overall, Team A gets 320 (=20+300) points for the class score.

We may increase the base points if the average score is too low. In that case, the maximum possible ranking score decreases by the amount we increase the base points (in other words, the first-place team will always have 400 points).