CTF challenges & writeups

1454 challenges in family ⊕ crypto ✕ clear · browse all techniques

Challenge	CTF	Weight	Category	Has
b4by_jail #pyjail #unicode-normalization	Pearl 2024	23.95	Misc	files wu 2
rusty_proxy #rust #xor	Pearl 2024	23.95	Reverse	files wu 1
Almost_Large_Enough #rsa	SpartanCTF 2024	–	Crypto	files wu 1
Crossing_the_Rubicon_I #substitution-cipher	SpartanCTF 2024	–	Crypto	files wu 1
Crossing_the_Rubicon_II #rot13	SpartanCTF 2024	–	Crypto	files wu 1
In_Plain_Sight #steghide #base64	SpartanCTF 2024	–	Forensics	files wu 1
Numbers_on_the_Orient_Express #caesar-cipher #rail-fence	SpartanCTF 2024	–	Crypto	files wu 1
Whose_Encoding_Is_It_Anyway_I #base32	SpartanCTF 2024	–	Crypto	files wu 1
the_receiver_of_many #encoding-decoding #book-cipher	SpringForwardCTF 2024	22.40	Crypto	files wu 1
Chemistry_Lab #python-random #mt19937 #dna-encoding	TheCyberJawaraInternational 2024	23.62	Crypto	files wu 1
colors_crypto #base64 #cyberchef	USC 2024	–	Crypto	files wu 1
unpopcorn #xor #custom-encoding	USC 2024	–	Crypto	files wu 1
Cryptordle #oracle-attack	UTCTF 2024	–	Crypto	files src
bits_and_pieces #rsa #fermat-factorization #common-factor	UTCTF 2024	–	Crypto	files src
cvv #des #cvv	UTCTF 2024	–	Misc	files src
long caesar #caesar-cipher #bruteforce	UTCTF 2024	–	Crypto	files src
numbers go brrr 2 #weak-prng	UTCTF 2024	–	Crypto	files src
numbers_go_brrr #weak-prng #middle-square #bruteforce	UTCTF 2024	–	Crypto	files src
simple morse #morse-code #audacity	UTCTF 2024	–	Crypto	files src
simple signature #signature-forgery	UTCTF 2024	–	Crypto	files src
Cheat_Code #timing-attack	WaniCTF 2024	24.99	Misc	files wu 1
Easy_calc #modular-arithmetic	WaniCTF 2024	24.99	Crypto	files wu 1
One_Day_One_Letter #signature-forgery #rogue-time-server	WaniCTF 2024	24.99	Web	files wu 1
beginners_aes #aes #iv-bruteforce	WaniCTF 2024	24.99	Crypto	files wu 1
beginners_rsa #rsa #multi-prime-rsa #factorization	WaniCTF 2024	24.99	Crypto	files wu 1
replacement #substitution #lookup-table	WaniCTF 2024	24.99	Crypto	files wu 1
Sudoku #substitution-cipher	Wargames.MY 2024	–	Reverse	files wu 1
tss1 #schnorr #rogue-key-attack	angstromCTF 2024	–	Crypto	files src
tss2 #schnorr #ros-attack	angstromCTF 2024	–	Crypto	files src
decrypt_me #mersenne-twister	cr3 2024	23.96	Reverse	files wu 1
embedding #lattice #polynomial	cr3 2024	23.96	Crypto	files wu 1
maskRSA #rsa #groebner-basis	cr3 2024	23.96	Crypto	files wu 1
mba_boy #gameboy #mba #z3	cr3 2024	23.96	Reverse	files wu 1
randomness_revenge #shellcode #xor	cr3 2024	23.96	Pwn	files wu 1
Deep_Cover #substitution-cipher #frequency-analysis	vikeCTF 2024	23.64	Crypto	files wu 1
Norse_Cryptogram #runes #rot13	vikeCTF 2024	23.64	Crypto	files wu 1
DiffieHellman #diffie-hellman #linear-recurrence	BSidesIndore 2023	18.80	Crypto	files wu 1
codebook #custom-cipher #image-metadata	BSidesSF 2023	35.00	Crypto	files wu 1
ctretry #aes-ctr #keystream-reuse #image-xor	BSidesSF 2023	35.00	Crypto	files wu 1
ecbreak #aes-ecb #ecb-penguin	BSidesSF 2023	35.00	Crypto	files wu 1

Challenges