$ ctf42

Challenges

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

Challenge CTF Weight Category Has
basic_sums
#digit-sum-crt
 KalmarCTF 2025 33.89 Crypto files wu 2
Symmetry_2
#out-of-bounds-write
 KalmarCTF 2024 24.21 Crypto files wu 1
breakfaest
#fiat-shamir-forgery
 KalmarCTF 2024 24.21 Crypto files wu 1
MissingNo.3 KalmarCTF 2026 49.97 Crypto files
RBG+ KalmarCTF 2026 49.97 Crypto files
monoDOOM_ETERNAL KalmarCTF 2026 49.97 Crypto files
ternarya KalmarCTF 2026 49.97 Crypto files
thousands_of_RNGs KalmarCTF 2026 49.97 Crypto files
MonoDOOM KalmarCTF 2025 33.89 Crypto files
Not_so_complex_multiplication KalmarCTF 2025 33.89 Crypto files
Very_Serious_Cryptography KalmarCTF 2025 33.89 Crypto files
ZZKAoK KalmarCTF 2025 33.89 Crypto files
laconic KalmarCTF 2025 33.89 Crypto files
lance_hard KalmarCTF 2025 33.89 Crypto files
short_circuit KalmarCTF 2025 33.89 Crypto files
Cracking_The_Casino KalmarCTF 2024 24.21 Crypto files
MathGolf_Warmup KalmarCTF 2024 24.21 Crypto files
Re_Cracking_The_Casino KalmarCTF 2024 24.21 Crypto files
Shipwrecked_Lattices KalmarCTF 2024 24.21 Crypto files
poLy1305CG KalmarCTF 2024 24.21 Crypto files
BabyOneTimePad KalmarCTF 2023 24.21 Crypto files
BlindSecurity KalmarCTF 2023 24.21 Crypto files
DreamHash KalmarCTF 2023 24.21 Crypto files
EasyOneTimePad KalmarCTF 2023 24.21 Crypto files
Reconstruction KalmarCTF 2023 24.21 Crypto files
Telepound KalmarCTF 2023 24.21 Crypto files
YoloProofs KalmarCTF 2023 24.21 Crypto files
l33t-generator KalmarCTF 2023 24.21 Crypto files