$ ctf42

Junior.Crypt 2025

weight 23.13 CTFtime official repo

Junior.Crypt.2025 CTF — an open cybersecurity competition for university students, college and school students, and anyone interested. This is a 48-hour online event. We hope all participants will be able to fully apply their skills and have a great time.

The CTF is organized by students from the Department of System Programming and Computer Security at Yanka Kupala State University of Grodno, Grodno, Belarus.

Team participation is required, with teams consisting of 1-4 members. Challenges will cover various categories—beginner, cryptography, forensics, miscellaneous, OSINT, ppc, pwn, rev, and web.

The official languages of the tournament are Russian and English. However, you can still participate even if you don’t speak either. We will do our best to ensure that every task is understandable with machine translation. Additionally, throughout the competition, we will introduce participants to the extraordinary beauty of our country—the Republic of Belarus.

Pwn 5

Challenge Has
ChattyParrot files
GoldenByte files
KindAuthor files
NeuralNet files
StackSmasher files

Reverse 8

Challenge Has
Compiled_Python files
Dynamic_Key files
Elven_Knot files
Hybrid_Encryption files
Little_warm_up files
More_than_a_warm_up files
Reverse_Puzzle files
Turing_Award files

Crypto 10

Challenge Has
Amount_of_his_dreams files
Bitflip_RSA files
Error_Based_Encryption files
Grey_Box_Hacking files
More_than_Ascii85 files
OTP_with_shift_register files
Signature_ECDSA files
The_Ripper files
Very_Obfuscated_Crypto files
Yin_Yang files

Forensics 4

Challenge Has
All_in_white files
Rainbow_in_White files
S=HxW files
White_Cat_in_a_White_Room files

Misc 18

Challenge Has
Birds_and_Wires files
Broken_ZKP._I files
Double_Trouble files
Error_another_error_... files
Homomorphic_Fraud files
Homomorphic_weak files
Intel_order_VS_Network_order files
Interesting_WAV files
National_Ornaments files
What_to_do_with_PPC files
ZKP_9+ files
ZKP_with_Hint files
100_percent_Robust_PRNG files
LCG_hack files
Python_PRNG_hack files
Randomized_Flag files
Robust_PRNG_in_Python files
steg files

OSINT 10

Challenge Has
A_friend_of_yours_says_hello files
Authors_autograph files
Center_of_Europe files
Chess_in_the_fog files
History_of_the_university files
Hollywood files
Name_of_the_stone files
No_drones_yet files
Origins_of_cybersecurity files
Photo_from_a_past_life files