CTF challenges & writeups

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

Challenge	CTF	Weight	Category	Has
AES-TR #aes #distinguisher	UMDCTF 2023	–	Crypto	files wu 1
CrossingTheRedSea #brainfuck #esolang #substitution-cipher	VishwaCTF 2023	22.69	Crypto	files wu 2
EmailIncoming #file-signature #archive-cracking #steganography	VishwaCTF 2023	22.69	Crypto	files wu 1
MechanicalEngineering #gcode #binary-encoding	VishwaCTF 2023	22.69	Reverse	files wu 1
SharingIsCaring #secret-sharing #bruteforce	VishwaCTF 2023	22.69	Crypto	files wu 1
TheSecretImage #visual-cryptography #image-subtraction	VishwaCTF 2023	22.69	Crypto	files wu 1
WednesdayThursdayFriday #z3 #constraint-solving	VishwaCTF 2023	22.69	Reverse	files wu 1
HomeworkHelp #reversing #buffer-overflow #xor	WolvCTF 2023	24.33	Reverse	files wu 2
Z2kDH #diffie-hellman #discrete-log #2-adic	WolvCTF 2023	24.33	Crypto	files wu 1
child-re #xor #static-analysis	WolvCTF 2023	24.33	Reverse	files wu 1
keyexchange #diffie-hellman #chosen-exponent	WolvCTF 2023	24.33	Crypto	files wu 2
cbc #classical-cipher #cbc-mode	corCTF 2023	36.97	Crypto	files wu 1
superbox #feistel-cipher #algebraic-cryptanalysis	corCTF 2023	36.97	Crypto	files wu 1
GCM #aes-gcm #nonce-reuse #forbidden-attack	insomnihack 2023 Quals	21.38	Crypto	files wu 1
Aes-1 #hardcoded-password	n00bzCTF 2023	15.12	Crypto	files wu 1
Conditions #unicode-case-expansion	n00bzCTF 2023	15.12	Web	files wu 1
MaaS #modulus-recovery-oracle	n00bzCTF 2023	15.12	Crypto	files wu 2
bloom_bloom #bloom-filter	snakeCTF 2023	–	Crypto	files wu 1
little_errors_made_it_possible #lwe	snakeCTF 2023	–	Crypto	files wu 1
Sheep_loves_Maths #zip-crc32-bruteforce #archive-forensics	vsCTF 2023	23.32	Misc	files wu 1
x0rr3al #xor #string-obfuscation	vsCTF 2023	23.32	Reverse	files wu 1
NetFS_1 #oracle-attack #password-bruteforce	zer0pts 2023	52.62	Misc	files wu 1
NetFS_2 #timing-attack #side-channel #password-bruteforce	zer0pts 2023	52.62	Misc	files wu 1
decompile_me #rc4 #reversing #keystream	zer0pts 2023	52.62	Reverse	files wu 1
mimikyu #reversing #custom-loader #modular-exponentiation #gmp	zer0pts 2023	52.62	Reverse	files wu 1
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 #xor #base-conversion	1337UP 2022	22.49	Crypto	files wu 2
astronaut #lfsr #linear-algebra	Aero 2022	51.22	Crypto	files wu 1
Hidden_Frequencies #run-length-encoding	BCACTF 2022	–	Crypto	files wu 2
FunFact #single-byte-xor	BYUCTF 2022	–	Reverse	files src wu 1
TheMostWorthyDistinctionOfPain #dictionary-encoding	BYUCTF 2022	–	Crypto	files wu 2
TruthAndFalsehood #nested-base64	BYUCTF 2022	–	Crypto	files src wu 1
Wordle #hash-precomputation #unsalted-md5	BYUCTF 2022	–	Web	files wu 1
XQR #xor #qr-code	BYUCTF 2022	–	Crypto	files src wu 2
GottaCrackThemAll #wordlist #known-plaintext	CSAW 2022 Quals	23.70	Crypto	files wu 1
starter_ecc #ecc-over-composite-modulus #modular-square-root #hensel-lifting #crt	Crypto 2022	48.20	Misc	files wu 1
CwyptographicOwacle #ecdsa #signature-oracle #private-key-recovery #aes	DaVinciCTF 2022	24.50	Crypto	files wu 1
MineGame #reversing #minesweeper #prng-prediction	DaVinciCTF 2022	24.50	Reverse	files wu 2
small_weiner #rsa #boneh-durfee #lattice #small-private-exponent	DaVinciCTF 2022	24.50	Crypto	files wu 2

Challenges