$ ctf42

Challenges

Category
Difficulty
CTFtime weight
–
Higher weight ≈ harder, more prestigious event.
Year
–
Must have
Reset

30 challenges · browse all techniques

Challenge CTF Weight Category Has
cube_cipher
#cipher-cycle-detection
 BuckeyeCTF 2025 – Crypto files wu 1
nitwit
#winternitz-ots-forgery
 BuckeyeCTF 2025 – Crypto files wu 1
Real_Smooth
#stream-cipher#known-plaintext
 BuckeyeCTF 2023 34.50 Crypto files wu 2
Defective_RSA
#rsa#eth-root#crt
 BuckeyeCTF 2021 24.81 Crypto files wu 1
Elliptigo
#ecc#small-subgroup-attack
 BuckeyeCTF 2021 24.81 Crypto files wu 1
Pseudo
#legendre-prng#fermat-pseudoprime
 BuckeyeCTF 2021 24.81 Crypto files wu 1
xnor BuckeyeCTF 2024 50.91 Crypto files wu 1
Key_exchange BuckeyeCTF 2021 24.81 Crypto files wu 1
Augury BuckeyeCTF 2025 – Crypto files
Clandescriptorius BuckeyeCTF 2025 – Crypto files
cube_cipher_2 BuckeyeCTF 2025 – Crypto files
hashbrown BuckeyeCTF 2024 50.91 Crypto files
rsa BuckeyeCTF 2024 50.91 Crypto files
treestore BuckeyeCTF 2024 50.91 Crypto files
zkwarmup BuckeyeCTF 2024 50.91 Crypto files
My_First_Hash BuckeyeCTF 2023 34.50 Crypto files
Rivest_Shamir_Adleman BuckeyeCTF 2023 34.50 Crypto files
Secret_Code BuckeyeCTF 2023 34.50 Crypto files
Turtle_Tree BuckeyeCTF 2023 34.50 Crypto files
coding BuckeyeCTF 2023 34.50 Crypto files
coding_2 BuckeyeCTF 2023 34.50 Crypto files
QuadPrimeRSA BuckeyeCTF 2022 24.81 Crypto files
SSSHIT BuckeyeCTF 2022 24.81 Crypto files
TwinPrimeRSA BuckeyeCTF 2022 24.81 Crypto files
bonce BuckeyeCTF 2022 24.81 Crypto files
fastfor BuckeyeCTF 2022 24.81 Crypto files
megaxord BuckeyeCTF 2022 24.81 Crypto files
powerball BuckeyeCTF 2022 24.81 Crypto files
Key_exchange_2 BuckeyeCTF 2021 24.81 Crypto files
Super_VDF BuckeyeCTF 2021 24.81 Crypto files