$ ctf42

Challenges

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

Challenge CTF Weight Category Has
Compact
#dotsies-cipher
 BYUCTF 2023 – Crypto files wu 1
Poem
#keyboard-shift-cipher
 BYUCTF 2023 – Crypto files wu 1
RSA1
#rsa#small-modulus-factorization
 BYUCTF 2023 – Crypto files wu 1
RSA2
#rsa#factordb
 BYUCTF 2023 – Crypto files wu 1
RSA3
#rsa#common-factor
 BYUCTF 2023 – Crypto files wu 1
RSA4
#rsa#hastad-broadcast
 BYUCTF 2023 – Crypto files wu 1
RSA5
#rsa#common-modulus-attack
 BYUCTF 2023 – Crypto files wu 1
TheMostWorthyDistinctionOfPain
#dictionary-encoding
 BYUCTF 2022 – Crypto files wu 2
TruthAndFalsehood
#nested-base64
 BYUCTF 2022 – Crypto files src wu 1
XQR
#xor#qr-code
 BYUCTF 2022 – Crypto files src wu 2
AES_Scissor_Co_3 BYUCTF 2026 – Crypto files
Hurtful BYUCTF 2026 – Crypto files
Power_Tower BYUCTF 2026 – Crypto files
RSA_Dreams BYUCTF 2026 – Crypto files
sus_box BYUCTF 2026 – Crypto files
Anaken21sec1 BYUCTF 2025 – Crypto files
Anaken21sec2 BYUCTF 2025 – Crypto files
Choose_Your_RSA BYUCTF 2025 – Crypto files
Cycles BYUCTF 2025 – Crypto files
Hash_Based_Cryptography BYUCTF 2025 – Crypto files
Many_Primes BYUCTF 2025 – Crypto files
PEM BYUCTF 2025 – Crypto files
Real_Smooth BYUCTF 2025 – Crypto files
Are_S_A BYUCTF 2024 – Crypto files src
Austen_Supremacy BYUCTF 2024 – Crypto files
Do_Math BYUCTF 2024 – Crypto files src
Give_Up BYUCTF 2024 – Crypto files src
States BYUCTF 2024 – Crypto files
Times BYUCTF 2024 – Crypto files src
𐐗𐐡𐐆𐐑𐐓𐐄 BYUCTF 2023 – Crypto files
KendrickLamar BYUCTF 2022 – Crypto files
ShiftingMindset BYUCTF 2022 – Crypto files src
Shouty2 BYUCTF 2022 – Crypto files
Take Me Out to the Ball Game BYUCTF 2022 – Crypto files src