Ethical hacking contest


In the domain of information security, Capture The Flag (CTF) is a game-like competition where participants are required to attack and defend computer systems in a controlled environment and in a legal way. Various problem solving tasks require from players knowledge in reverse engineering, web application analysis, cryptanalysis, forensics and exploit development among others.

There are mainly two types of CTF competitions:

  • In Jeopardy-style competitions participants are given a number of tasks or problems in various categories and points are awarded for problem solving with respect to the task difficulty. The ranking is established according to points obtained by the teams or individual players.
  • In an Attack-defense competition participants are provided with vulnerable environments which they need first to analyse and patch. Afterwards teams environments are interconnected and every team would try to exploit each other services and gain points. The team who gets compromised looses points.

Many CTF competitions are organised regularly online and locally. It is a good educational experience and a perfect way to learn and practice your skills in different security areas in real-world scenarios.

Contest details

Faithful to last editions (Y-NOT-CTF 2015, 2016, and 2017) and to other major information security events, we would like to offer our participants a CTF event on Friday Nov 9, 2018 from 5pm till 11:00pm. This is a Jepoardy-style CTF meaning that participants will be required to solve challenges in different categories (binary analysis, exploitation, forensics, web).

There will be challenges in different categories (Web exploitation, software exploitation, reverse engineering, cryptography, etc.) with different levels accessible to begining, intermediate and advanced CTF-players.


  • The participation to the Y-NOT-CTF is open to everyone, conference participants and externals alike.
  • The participation is free.


Drinks, pizza, and burgers will be available. The two following foodtrucks will be present:

  • The Rolling chef - burger & wrap (from 18h00 to 21h00)
  • Pizzeria Petit Four and his barTruck (from 18h00 to 22h00)


  • Number of participants is limited.
  • Each participant should register himself by subscribing a free ticket.
  • See the page Register.

Team compositions

  • You can participate individually or by team.
  • The final registration of yourself/your team is done at the beginning of the CTF. We do not need to know the composition of the teams before the CTF.

Further details

  • You can only participate from our local network.
  • Standard CTF rules apply. Details will be available during the contest.


  • The 3 top teams/players will be awarded some cool prizes.


  • Why not?

Organizing partners