$ ctf42

Challenges

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

Challenge CTF Weight Category Has
anti_fermat
#rsa#factorization#known-sum#bit-complement
 zer0pts 2022 35.97 Crypto files wu 3
karen
#lll (lll-lattice-reduction)#orthogonal-lattice#lattice
 zer0pts 2022 35.97 Crypto files wu 1
mathhash
#custom-hash#floating-point#byte-by-byte-bruteforce
 zer0pts 2022 35.97 Crypto files wu 1
easy_pseudo_random
#blum-blum-shub#lll (lll-lattice-reduction)#lattice#msb-recovery
 zer0pts 2021 24.56 Crypto files wu 2
janken_vs_yoshiking
#elgamal#quadratic-residue#legendre-symbol
 zer0pts 2021 24.56 Crypto files wu 2
not_mordell_primes
#rsa#elliptic-curve#resultant#point-recovery
 zer0pts 2021 24.56 Crypto files wu 1
ot_or_not_ot
#oblivious-transfer#legendre-symbol#aes-cbc
 zer0pts 2021 24.56 Crypto files wu 2
signme
#rsa#signature-forgery#weak-prng#seed-bruteforce
 zer0pts 2021 24.56 Crypto files wu 1
warsamup
#rsa#franklin-reiter#related-message
 zer0pts 2021 24.56 Crypto files wu 3
Elliptic_Ring_RSA zer0pts 2023 52.62 Crypto files
RSALCG2 zer0pts 2023 52.62 Crypto files
SquareRNG zer0pts 2023 52.62 Crypto files
Unlimited_Braid_Works zer0pts 2023 52.62 Crypto files
easy_factoring zer0pts 2023 52.62 Crypto files
moduhash zer0pts 2023 52.62 Crypto files
curvecrypto zer0pts 2022 35.97 Crypto files
eddh zer0pts 2022 35.97 Crypto files
ok zer0pts 2022 35.97 Crypto files
pure_division zer0pts 2021 24.56 Crypto files
triple_aes zer0pts 2021 24.56 Crypto files