Are you a student or a professional into coding or cybersec?
Solve three CTF (Capture the Flag) challenges to unlock extra code challenge input files and use your favourite programming language to compete against developers from all around the world solving algorithm-based puzzles.
Climb the University Students' League
Join and win a Reply Arcade Game cabinet or a donation for your university.
The Hack the Code Challenge is an international team-based competition mixing coding and cyber security. Teams will have 6 hours to solve an algorithm-based problem using a specified input file format and a few scoring rules. Some input files will be available from the beginning of the challenge. Extra input files can only be unlocked by completing CTF (Capture the Flag) challenges in the following categories: Miscellaneous, Crypto, and Web.
Unlocking these files will give the chance to get more points.
STANDARD ED.
Open to all code and cyber security enthusiasts aged 16 or older, with logical mathematical problems to solve by writing an algorithm in any programming language along with CTF challenges in the categories of Misc, Crypto and Web.
REPLYERS' ED.
An exclusive edition for Replyers with the same rules as the external competition, featuring a dedicated leaderboard and unique prizes.
REGISTRATION
Jan 29 - Mar 11, 2025
TEAM UP
till Mar 11, 2025
TRAINING
CHALLENGE DAY
Mar 12, 2025 - 15:30 CET
AWARDS
by March 31th, 2025
registrations will close in
00days
00hours
00minutes
Join before it’s too late
To play the challenge registration in a team is needed.
EXTENDED! Register by 12th March, 15:00 CET, choosing the category that best fits for you.
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.
No worries! No matter how good you are at coding and security, learning is always the key for improvement. Access exclusive learning material to get ready for the next challenge.
Breaking news
This year, discover new things about the most common cyber security attacks with some Capture The Flag problems. Learn with the basic tips in the Train&Learn section and check out the write-ups from previous editions to discover the best approaches.
On March 12, at 15:30 CET, we’ll publish the problem statement on your challenge page and you'll have 6 hours to play. Some input files will be available from the beginning of the challenge. Extra input files can only be unlocked by completing CTF (Capture the Flag) challenges in the following categories: Miscellaneous, Crypto, and Web.
Unlocking these files will give the chance to get more points.
A leaderboard will be regularly updated to show how your and other teams are performing.
One week after the challenge day the final leader board will be published together with the best solutions. Each member of the winning team will get a reward of:
🥇 € 2.500 each 🥈 € 1.000 each 🥉 € 800 each
Afraid of the low positions? Register to the University League to have more chances to win a special prize for your University.
The challenge has been designed by a team of 22 coding and security experts from Reply, that will support you on the day of the challenge.
Marco
CODE MASTER
Matteo
KEEN MIND
Stefano
Code master
Giuseppe
CODE MASTER
Gabriele
KEEN MIND
Gaspare
Code master
Francesca
KEEN MIND
Rosa
Keen mind
Chiara
Code master
Gianmarco
Code master
Matteo
Keen Mind
Giacomo
CODE MASTER
Mattia
keen mind
Claudio
CODE MASTER
Federico
Keen Mind
Alessandro
Keen Mind
Mirko
Code master
Thierry
code Master
Sirian
Code master
Luca
code master
Marino
Code Master
Francesco
Code master
Maurizio
Code master
Any doubts?
How will we get updates about the Reply Hack The Code Challenge?
You’ll get some emails before and after the challenge, so check your mailbox regularly. You can always message the Reply Code Masters & Keen Minds during the challenge via chat if you have questions.
What should our source code look like?
Your team can use publicly released libraries and tools, but your solution must use original code. To be valid, every submission must include a file containing the source code of the program you developed to generate the output. Each source code file must be a UTF-8 plain text file or an archive of UTF-8 files.
Who wins?
At the end of the game, the Reply Code Masters & Keen Minds will review and validate the best scoring submission from top-ranked teams on the leaderboard. The Reply Code Masters’ & Keen Minds' decisions regarding the rules of the coding competition are final.