$ ctf42

Challenges

Category
Difficulty
CTFtime weight
–
Higher weight ≈ harder, more prestigious event.
Year
–
Must have
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27 challenges · browse all techniques

Challenge CTF Weight Category Has
Last_Flight
#isogeny#supersingular-elliptic-curve
 SECCON 2025 Quals – Crypto files wu 1
BBB
#rsa#hastad-broadcast#prng
 SECCON 2022 Quals 97.90 Crypto files wu 1
insufficient
#secret-sharing#cvp#lattice
 SECCON 2022 Quals 97.90 Crypto files wu 1
janken_vs_kurenaif
#mt19937#seed-recovery
 SECCON 2022 Quals 97.90 Crypto files wu 1
pqpq
#rsa#polynomial
 SECCON 2022 Quals 97.90 Crypto files wu 1
this_is_not_lsb
#rsa#lsb-oracle#lll (lll-lattice-reduction)
 SECCON 2022 Quals 97.90 Crypto files wu 1
witches_symmetric_exam
#padding-oracle#ofb#gcm
 SECCON 2022 Quals 97.90 Crypto files wu 1
Sign_Wars
#ecdsa#biased-nonce#lattice#mt19937
 SECCON 2021 – Crypto files wu 1
cerberus
#padding-oracle#cbc#decryption-oracle
 SECCON 2021 – Crypto files wu 1
Nostalgic SECCON 2025 Quals – Crypto files
cbc_magic_word SECCON 2025 Quals – Crypto files
yukari SECCON 2025 Quals – Crypto files
yukari_infinity SECCON 2025 Quals – Crypto files
Tidal_wave SECCON 2024 Quals – Crypto files
dual_summon SECCON 2024 Quals – Crypto files
reiwa_rot13 SECCON 2024 Quals – Crypto files
seqr SECCON 2024 Quals – Crypto files
xiyi SECCON 2024 Quals – Crypto files
CIGISICGICGICG SECCON 2023 Quals 100.00 Crypto files
Increasing_Entropoid SECCON 2023 Quals 100.00 Crypto files
RSA_4_0 SECCON 2023 Quals 100.00 Crypto files
mystic_harmony SECCON 2023 Quals 100.00 Crypto files
plai_n_rsa SECCON 2023 Quals 100.00 Crypto files
CCC SECCON 2021 – Crypto files
XXX SECCON 2021 – Crypto files
oOoOoO SECCON 2021 – Crypto files
pppp SECCON 2021 – Crypto files