CTF challenges & writeups

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

Challenge	CTF	Weight	Category	Has
Password_recovery #xorshift #xor	Glacier 2023	24.32	Reverse	files wu 1
RPGO #golang #binary-patching	Glacier 2023	24.32	Reverse	files wu 1
SLCG #lcg	Glacier 2023	24.32	Crypto	files wu 1
Shuffled_AES #aes #modified-aes	Glacier 2023	24.32	Crypto	files wu 1
Walking_to_the_Sea_Side #csidh #isogeny	Glacier 2023	24.32	Crypto	files wu 1
Least_Common_Genominator #rsa #lcg #prime-generation	GoogleCTF 2023	–	Crypto	files wu 1
MHK2 #knapsack #lattice	GoogleCTF 2023	–	Crypto	files wu 1
NPC #graph #subset-sum	GoogleCTF 2023	–	Misc	files wu 1
under-construction #parameter-pollution #parser-differential	GoogleCTF 2023	–	Web	files wu 1
EncryptService #aes-ctr #keystream-reuse	GreyCatTheFlag 2023 Quals	–	Crypto	files wu 1
GreyCat_Trial #fermat-pseudoprime #number-theory	GreyCatTheFlag 2023 Quals	–	Crypto	files wu 1
OT #oblivious-transfer #pollard-p-1 #smooth-prime	GreyCatTheFlag 2023 Quals	–	Crypto	files wu 1
ReService #go-reversing #c2 #time-based-key	GreyCatTheFlag 2023 Quals	–	Reverse	files wu 1
Careless_Padding #padding-oracle	HITCON 2023 Quals	99.75	Crypto	files wu 1
brain-hurt #xor	HSCTF 2023	–	Reverse	files wu 1
cupcakes #vigenere	HSCTF 2023	–	Crypto	files wu 1
double-trouble #caesar-cipher	HSCTF 2023	–	Crypto	files wu 3
mystery-methods #encoding-chain	HSCTF 2023	–	Reverse	files wu 2
really-small-algorithm #rsa	HSCTF 2023	–	Crypto	files wu 1
spring #java-random	HSCTF 2023	–	Crypto	files wu 1
trios #substitution-cipher	HSCTF 2023	–	Crypto	files wu 2
Cube_Hash #bruteforce	Hack.lu 2023	94.73	Reverse	files wu 1
Lucky_Numbers #mersenne-prime	Hack.lu 2023	94.73	Crypto	files wu 1
Spooky_Safebox #lattice	Hack.lu 2023	94.73	Crypto	files wu 1
Futile #lfsr	HeroCTF 2023	–	Crypto	files wu 1
Hyper_Loop #repeating-key-xor	HeroCTF 2023	–	Crypto	files wu 1
Impossible_v2 #aes	HeroCTF 2023	–	Pwn	files wu 1
Uniform #mersenne-twister #prng-state-recovery	HeroCTF 2023	–	Crypto	files wu 1
Steg_Crack #zip-cracking #bkcrack #known-plaintext	ISITDTU 2023 Quals	37.00	Misc	files wu 1
Imaginary_Casino #isogeny #supersingular-curve #prng	ImaginaryCTF 2023	34.52	Crypto	files wu 1
Sus #polynomial-ring #factorization	ImaginaryCTF 2023	34.52	Crypto	files wu 1
Tan #lll (lll-lattice-reduction)#precision-loss	ImaginaryCTF 2023	34.52	Crypto	files wu 1
Wasteful #rsa	ImaginaryCTF 2023	34.52	Crypto	files wu 1
emoticons #substitution-cipher #frequency-analysis	ImaginaryCTF 2023	34.52	Crypto	files src wu 1
rev #raid-recovery #known-plaintext	ImaginaryCTF 2023	34.52	Forensics	files wu 1
roks #lfi-double-encoding	ImaginaryCTF 2023	34.52	Web	files wu 2
AlienMath #predictable-rng	IrisCTF 2023	24.59	Reverse	files wu 1
babynotrsa #modular-inverse	IrisCTF 2023	24.59	Crypto	files wu 1
chinese-lazy-theorem-2 #crt-reconstruction	LA 2023	–	Crypto	files wu 1
greek-cipher #substitution-cipher	LA 2023	–	Crypto	files wu 2

Challenges