A 24 hours online CTF competition about security in the field of coding, web, miscellaneous, crypto and binary.
Info
Are you a student or a professional into cyber security?
The Cyber Security Challenge is a 24-intense-hours, international CTF competition, powered by Reply since 2018, where teams of security lovers come to solve a matrix of 25 problems made of 5 categories. The winning team is the one who finds the highest number of flags.
To play the challenge registration in a team is needed.
While registering, tell us the name of your University to join the University Students' League and try to win a Reply Arcade Game or a financial donation for a research project.
To compete you have to form a team from 2-4 members.
If you already know some good coders, create your own team and invite your friends.
Otherwise search for and meet new teammates from all over the world on the Discord server.
⚠️ If you don’t join any team, your registration won’t be completed and you cannot take part to the challenge.
Do not waste time: while waiting for the next round train your skills with past editions problems and access exclusive tips and tricks to face a Capture the Flag competition as a real cyber security master.
On the challenge day we’ll publish the 25 problems to be solved on your challenge page.
Solve the first three problems of each category to unlock the next levels, and find as many 🚩 hidden flags as you can. The more problems you solve, the higher you'll climb on the leaderboard.
Note: a write-up file explaining your problem solving strategy will confirm the winners ranking
One week after the CTF the final leader board will be published and all finalists for each category notified.
Each member of the winning team wins:
🥇 a Gaming laptop
🥈 a Beats Studio3 headphones
🥉 a Gaming keyboard Razer
Afraid of the low positions? Register to the University Students' League to have more chances to win special gadgets.
The challenge has been designed by a team of coding experts from Reply (the Keen Minds), that will support you the days of the challenge.
The challenge has been designed by a team of coding experts from Reply (the Keen Minds), that will support you the days of the challenge.
The challenge has been designed by a team of coding experts from Reply (the Keen Minds), that will support you the days of the challenge.
First of all check your mailbox regularly: you’ll get some emails before and after the challenge. On this website you can monitor your challenge progress directly in your profile. If something won't be clear, you can always message the Reply Keen Minds during the challenge via chat.
The flag is a token or a string that match the following regular expression: /\{FLG:.+\}/ where the content is any non-empty ASCII string (uppercase and lowercase letters, digits or symbols).
The problems are divided into five categories (Coding, Web, Miscellaneous, Crypto, Binary), described below:
CODING – this category relates to problems you’ll need to solve using your programming languages and coding skills.
WEB – this category focuses on finding and exploiting vulnerabilities in web applications.
CRYPTO – this category involves attacking poorly implemented cryptographic algorithms, finding their vulnerabilities, then decrypting encrypted messages.
BINARY – this category involves reverse engineering and exploiting security vulnerabilities in binary applications.
MISCELLANEOUS – this category combines challenges from all the other categories, and requires additional skills such as stegano, forensic, recon, as well as general knowledge.
Get even more curious: discover the other challenges