CTF challenges & writeups

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

Challenge	CTF	Weight	Category	Has
BackToTheFORK #fork-cipher #differential-cryptanalysis	snakeCTF 2024 Quals	24.79	Crypto	files wu 1
Funtran #fortran #linear-system	snakeCTF 2024 Quals	24.79	Reverse	files wu 1
In_tun_Group_di_Esperts #ige-mode #padding-oracle	snakeCTF 2024 Quals	24.79	Crypto	files wu 1
Mega_secure #rsa #aes-cbc	snakeCTF 2024 Quals	24.79	Crypto	files wu 1
RoboTank #discrete-log #signature-forgery	snakeCTF 2024 Quals	24.79	Misc	files wu 1
This_iS_not_PN #spn #equation-solving	snakeCTF 2024 Quals	24.79	Crypto	files wu 1
Lazy_RSA #rsa #known-primes	squ1rrel 2024	24.25	Crypto	files wu 1
RSA_RSA_RSA #rsa #hastad-broadcast #crt	squ1rrel 2024	24.25	Crypto	files wu 1
not_quite_caesar #seeded-prng #operation-inversion	vsCTF 2024	34.00	Crypto	files wu 2
1_10 #knapsack #merkle-hellman #lll (lll-lattice-reduction)	1337UP 2023	24.23	Crypto	files wu 1
Encoding #multi-layer-encoding #base32 #base64 #morse	1337UP 2023	24.23	Misc	files wu 1
FlagChecker #z3-constraint-solving #rust-reversing	1337UP 2023	24.23	Reverse	files wu 2
Keyless #reversible-arithmetic-cipher #no-key-encoding	1337UP 2023	24.23	Crypto	files wu 2
Not_So_Smooth #linear-congruence-recovery #modular-arithmetic #xor	1337UP 2023	24.23	Crypto	files wu 1
Really_Secure_Apparently #rsa #wiener-attack #small-private-exponent	1337UP 2023	24.23	Crypto	files wu 2
Compact_XORs #xor	AmateursCTF 2023	24.54	Crypto	files wu 1
OwO_time_pad #repeating-key-xor	AmateursCTF 2023	24.54	Crypto	files wu 1
Weak_Primes #rsa #weak-prime-generation	AmateursCTF 2023	24.54	Crypto	files wu 1
You_get_extra_information_1 #rsa #equation-solving	AmateursCTF 2023	24.54	Crypto	files wu 1
go-gopher #ssrf #gopher-protocol	AmateursCTF 2023	24.54	Web	files wu 3
006-1 #hash-cracking #md5	BYUCTF 2023	–	Misc	files src wu 1
006-2 #hash-cracking #sha1 #custom-wordlist	BYUCTF 2023	–	Misc	files src wu 1
CRConfusion #crc #bruteforce	BYUCTF 2023	–	Forensics	files src wu 1
Chain #xor	BYUCTF 2023	–	Reverse	files wu 1
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
RevEng #xor-decryption #ghidra	BYUCTF 2023	–	Reverse	files wu 1
Curvy_Curves #elliptic-curve-over-ring #rsa-factoring	BackdoorCTF 2023	–	Crypto	files wu 1
Knapsack #knapsack #meet-in-the-middle (mitm)	BackdoorCTF 2023	–	Crypto	files wu 2
PRSA #polynomial-ring-rsa #gf-2-polynomial-factorization	BackdoorCTF 2023	–	Crypto	files wu 1
Something_in_Common #rsa #hastad-broadcast #non-coprime-moduli #crt	BackdoorCTF 2023	–	Misc	files wu 2
mini_RSA #rsa #small-exponent #cube-root	BackdoorCTF 2023	–	Misc	files wu 1
Classic_Checkers #constraint-solving #lisp	BlueHens 2023	24.61	Reverse	files wu 3
Greatest_Hits_1_of_4 #nested-encoding	BlueHens 2023	24.61	Crypto	files wu 1
Hide_n_Seek #steganography #morse-code #steghide	BlueHens 2023	24.61	Crypto	files wu 2

Challenges