Challenge SingleRow Updated! 2025-Jul-12 08:08:10
In SingleRow challenge please re-download the attachment!
Challenge Sobata_II Updated! 2025-Jul-12 02:33:49
In Sobata_II challenge please re-download the attachment! This change does not affect your main solution and is solely implemented to prevent malicious activity on the server. I would like to thank the team KuK Hofdechiffrierungsdienst who reported this bug.
Challenge ASIS Primes Updated! 2025-Jul-12 01:14:45
In ASIS Primes challenge please re-re-download the attachment!
Challenge Mechanic_II Updated! 2025-Jul-12 11:04:18
In Mechanic_II challenge please re-download the attachment!
Mechanic challenge file update 2025-Jul-12 07:13:20
In the Mechanic challenge, a file was missed in the attachments section. Please download the challenge attachment again!
📅 New Date: 12 July (Saturday) at 06:00 UTC 2025-Jul-10 04:52:59
We hope to see you there—let’s crack some crypto together!
CryptoCTF 2025 postponed! 2025-Jun-14 01:00:00
Due to the brutal attack by the Zionist regime on Iran, we are forced to postpone the CryptoCTF. New date TBD.
#Death_to_the_aggressor
7th Crypto CTF 2025 website 2025-May-25 03:07:47
The 7th Crypto CTF website is now online. The countdown timer shows the remaining time to 6th Crypto CTF 2025. There are some links to access News, FAQ, etc. You can see Crypto CTF archives for 2024, 2023, 2022, 2021, 2020, and 2019 too at {2024,2023,2022,2021,2020,2019}.cr.yp.toc.tf. Have fun!
Crypto CTF registration is now open! 2025-May-25 03:07:47
Registration is open now, please go to the registration page. If you have any problem with the registration process, feel free to contact us. Note that anyone can register freely.