Best Cyber Hacking Challenges

Better known as Capture the Flag (CTF), cyber hacking competitions and challenges are held on a monthly basis by organizations and universities on a global scale. They come in 3 most common types: Attack / Defense, Jeopardy, and Mixed. We will discuss some of the most iconic challenges from all over the world. These are all certified and approved by professional cybersecurity organizations.


DEF CON 28 | The “Hackers” Favorite Hacker Conference

The DEF CON is one of the largest and also the oldest hacker summit, which takes place annually in Las Vegas (USA). The first one took place in June 1993. DEF CON brings together cyber security researchers, journalists, federal government agents, security professionals and students. Originally, this event was organized by Team Binjitsu of ddtek until 2012 and then by Team Legitimate Business Syndicate until 2017 and after that by Team Order of the Overflow. The Black Badge is the biggest award that DEF CON gives to the winners of the competition.

InCTF International

Biz44re Writeup( InCTF International 2018) – Knowing The Unknown

InCTF is the online jeopardy format in CTF style. This is the very first Indian CTF. This event is organized by team bi0s. Team bi0s is the academic team of the University of Amrita, Campus Amritapuri. This event focuses mainly on the basic CTF category (Crypto, Web, Reversing, Pwn, Forensics). The challenges are of quite good quality and everyone enjoys solving them.

Pwn2Win CTF 2020

CTF-BR! – criptografia

Pwn2Win CTF is the online jeopardy style CTF. It is organized by the Epic Leet team, a Brazilian CTF team. The CTF is designed for intermediate and advanced players. The duration of the event is 48 hours in a row.

RCTF 2020

RCTF 2020 • Animal • Challenge solution - YouTube

RCTF is the online competition “Capture the Flag” in the style of Jeopard, presented by Team ROIS. It is an academic team from Fuzhou University, China. ROIS stands for Research Of Information Security.


Insomni'hack (@1ns0mn1h4ck) | Twitter

This finale of the Ethical Hacking Contest is played at the conference and this conference is held in Geneva, Switzerland. The organizers will provide the hotel and tickets for the event for the top 3 teams. The 4th, 5th and 6th team will receive tickets for the conference.


Google CTF (2018): Beginners Quest - Introduction - Jack Hacks

As Google organizes various geeky competitions over the course of a year, the company also organizes GoogleCTF, the world’s best cyber-hacking competition. This competition consists of two events, the first event being a qualification round. Here they cover a wide range of security exercises to test participants’ security skills. From this first round, Google will select a number of teams to take part in the final round, which will take place at the Google office location.

plaidCTF / PlaidCTF 2020

This competition is organized by the competitive hacking team at Carnegie Mellon University, the Plaid Parliament of Pwning, also known as PPP. Plaid CTF 2020 is a web-based CTF. The cash prizes for the three best teams are 8192 USD, 4096 USD and 2048 USD. The winner will qualify for the Defcon CTF final.

0CTF/TCTF / 0CTF/TCTF 2020 Quals

This competition is organized by Team 0ops and Tencent Representative of Shanghai Jiao Tong University. The format of the game is dangerous and open to any team in the world. Meanwhile, there is no limit to the number of participants of any team.


FAUST CTF is the classic online attack-defense CTF. Each team receives a Vulnbox image for their own hosting and VPN access. They will execute exploits against other teams, capture flags and submit them to our server. In addition, the first team to exploit the service, submit a valid flag and write a report will win €64 for each service.

ASIS CTF Quals 2020 / ASIS CTF Quals 2020

ASIS CTF is the online threat format CTF. This event is organized by the asis team, it is an academic team of Iran. At this event there are several categories of challenges like crypto, web, reverse engineering, pwn and forensics.

Meanwhile, all these CTF competition rankings are based on the ctftime rating (including last year’s and this year’s ratings). Furthermore, these competitions are very geeky and if you play alone or with your friends in these competitions, you will gain both knowledge and fun.