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Challenges

Category
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Higher weight ≈ harder, more prestigious event.
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31 challenges · browse all techniques

Challenge CTF Weight Category Has
oneline6ryp7o
#lattice#modular-arithmetic#mersenne-modulus
 SekaiCTF 2026 79.25 Crypto files wu 1
Alter_Ego
#csidh#isogeny
 SekaiCTF 2025 55.00 Crypto files src wu 1
Diffecientwo
#hash-collision#z3#murmurhash3
 SekaiCTF 2023 24.86 Crypto files wu 1
Noisier_CRC
#crc#crt#polynomial
 SekaiCTF 2023 24.86 Crypto files wu 1
Noisy_CRC
#crc#polynomial#crt
 SekaiCTF 2023 24.86 Crypto files wu 1
RandSubWare
#differential-cryptanalysis#spn
 SekaiCTF 2023 24.86 Crypto files wu 1
cryptoGRAPHy_1
#graph-encryption#token-decryption
 SekaiCTF 2023 24.86 Crypto files wu 1
cryptoGRAPHy_2
#graph-encryption#leakage-abuse#shortest-path-tree
 SekaiCTF 2023 24.86 Crypto files wu 1
cryptoGRAPHy_3
#graph-encryption#query-recovery#leakage-abuse
 SekaiCTF 2023 24.86 Crypto files wu 1
Diffecient
#hash-collision#bloom-filter#murmurhash3
 SekaiCTF 2022 24.86 Crypto files wu 1
FaILProof
#linear-algebra
 SekaiCTF 2022 24.86 Crypto files wu 1
RobustCBC
#cbc-mac#mac-forgery#truncation-collision
 SekaiCTF 2022 24.86 Crypto files wu 1
SecureImageEncryption
#permutation-cipher#chosen-plaintext
 SekaiCTF 2022 24.86 Crypto files wu 1
TimeCapsule
#stream-cipher#keystream-recovery#permutation-bruteforce
 SekaiCTF 2022 24.86 Crypto files wu 3
Iihash SekaiCTF 2026 79.25 Crypto files
apbq_rsa_iv SekaiCTF 2026 79.25 Crypto files
needLe_in_a_multivariate_sekai SekaiCTF 2026 79.25 Crypto files
orbital_strike SekaiCTF 2026 79.25 Crypto files
APES SekaiCTF 2025 55.00 Crypto files
I_Dream_of_Genni SekaiCTF 2025 55.00 Crypto files
Law_And_Order SekaiCTF 2025 55.00 Crypto files
SSSS SekaiCTF 2025 55.00 Crypto files src
unfairy-ring++ SekaiCTF 2025 55.00 Crypto files src
unfairy_ring SekaiCTF 2025 55.00 Crypto files src
Hayabusa SekaiCTF 2024 36.96 Crypto files
Master_Spark SekaiCTF 2024 36.96 Crypto files
Some_Trick SekaiCTF 2024 36.96 Crypto files
Squares_vs._Cubes SekaiCTF 2024 36.96 Crypto files
sqrt163 SekaiCTF 2024 36.96 Crypto files
zerodaycrypto SekaiCTF 2024 36.96 Crypto files
EZmaze SekaiCTF 2022 24.86 Crypto files