LYKNCTF 2026

official repo

LYKNCTF is a beginner CTF hosted by LYKN Team (Gen Z cybersecurity students, driven by curiosity and obsessed with CTFs). Join us online for jeopardy-style fun with challenges in Pwn, Reverse, Forensics, Crypto, Misc, Osint, Web

Team size: 4

Discord Server: https://discord.gg/HY7GWNN5wJ

Web 1

Challenge	Has
FU_Career #sql-injection-into-outfile	files wu 1

Pwn 7

Challenge	Has
Ez_Pwn #signed-integer-overflow	files wu 1
Glyph_Cache	files
H34P_D3V1L #tcache-poisoning	files wu 1
Return_to_Lose #ret2win	files wu 1
Shop	files
ez_pwn_revenge	files
golfing	files

Reverse 10

Challenge	Has
Control_Freak_1 #custom-cipher-reversing	files wu 1
Control_Freak_2 #splitmix64-prng	files wu 1
Control_Freak_3	files
Cr4ck_1	files
Cr4ck_2	files
Cr4ck_3	files
I_HATE_THIS_APP #static-string-analysis	files wu 1
I_HATE_THIS_APP_REVENGE #aes-ctr-fixed-key	files wu 1
Inferior_Student	files
Waguri2 #brainfuck-esolang	files wu 1

Crypto 7

Challenge	Has
Cyclic_Echo	files
Noisy_Broadcast	files
Replay_Jasmine	files
SHA256	files
Shortcut	files
Sleepless_Machine	files
Whispering	files

Forensics 9

Challenge	Has
Echoes	files
Follow_The_Layer #blockchain-transaction-tracing	files wu 1
NotPet_y_a	files
One_Stroke	files
Remedy	files
Thanh_Hoa_1	files
Thanh_Hoa_2	files
World_Cup_1 #lsb-steganography	files wu 1
World_Cup_2 #polyglot-appended-zip	files wu 1

Misc 4

Challenge	Has
Elliptic_Curve_Cryptography	files
Static	files
THE_BACKROOM_BABY	files
THE_BACKROOM_REVENGE	files

OSINT 11

Challenge	Has
Beauty_Beauty_Lake	files
Far_Away	files
Far_Away_Revenge	files
IMPORTANT_DEBRIS	files
Miss_My_Home_D	files
Miss_My_School	files
REDACTED_FRAME	files
Route_to_Nowhere	files
Tattoo	files
UNNAMED_MERCHANT	files
What_Does_the_Cat_Say	files