$ ctf42

Challenges

Category
Difficulty
CTFtime weight
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Higher weight ≈ harder, more prestigious event.
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15 challenges · browse all techniques

Challenge CTF Weight Category Has
1_10
#knapsack#merkle-hellman#lll (lll-lattice-reduction)
 1337UP 2023 24.23 Crypto files wu 1
Keyless
#reversible-arithmetic-cipher#no-key-encoding
 1337UP 2023 24.23 Crypto files wu 2
Not_So_Smooth
#linear-congruence-recovery#modular-arithmetic#xor
 1337UP 2023 24.23 Crypto files wu 1
Really_Secure_Apparently
#rsa#wiener-attack#small-private-exponent
 1337UP 2023 24.23 Crypto files wu 2
BinomialWays
#reversible-stream-cipher#modular-addition
 1337UP 2022 22.49 Crypto files wu 2
Equality
#rsa-common-modulus-attack
 1337UP 2022 22.49 Crypto files wu 1
WarmupEncoder 1337UP 2022 22.49 Crypto files wu 2
Black_Box_Blackjack 1337UP 2024 – Crypto files
Conversationalist 1337UP 2024 – Crypto files
Schrodingers_Pad 1337UP 2024 – Crypto files
The_Wizards_Game 1337UP 2024 – Crypto files
kRSA 1337UP 2024 – Crypto files
Share_It_1 1337UP 2023 24.23 Crypto files
Share_It_2 1337UP 2023 24.23 Crypto files
DanteInferno 1337UP 2022 22.49 Crypto files