CTF challenges & writeups

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

Challenge	CTF	Weight	Category	Has
The_Oracles_Prophecy #aes-cbc #padding-oracle #mac	LexingtonInformaticsTournament 2021	23.87	Crypto	files wu 1
A_to_Z #atbash-cipher	MetaCTF 2021	–	Crypto	files wu 3
Getting_Darryl_Back #xor-decryption-reversing	MetaCTF 2021	–	Reverse	files wu 1
I_Hate_Python #fixed-seed-prng	MetaCTF 2021	–	Reverse	files wu 2
Revvy_Chevy #lcg-keystream	MetaCTF 2021	–	Reverse	files wu 1
Size_Matters #rsa-factorization	MetaCTF 2021	–	Crypto	files wu 3
Thnks_fr_th_Pwds #base64-encoding	MetaCTF 2021	–	Crypto	files wu 3
Unbreakable_Encryption #otp-key-reuse	MetaCTF 2021	–	Crypto	files wu 2
Wrong_Way_on_a_One_Way_Street #hash-cracking	MetaCTF 2021	–	Crypto	files wu 3
DiceRoll #mt19937-prediction	NahamCon 2021	24.98	Crypto	files wu 3
Microscopium #pin-bruteforce	NahamCon 2021	24.98	Mobile	files wu 1
eaxy #xor #repeating-key	NahamCon 2021	24.98	Crypto	files wu 1
Fake_Medallion #quantum-cloning #mersenne-twister #quantum-money	PlaidCTF 2021	99.64	Crypto	files wu 1
Proxima_Concursus #hash-collision #birthday-attack #sponge-construction	PlaidCTF 2021	99.64	Crypto	files wu 1
leaky_block_cipher #small-multiplicative-order #polynomial-factorization	PlaidCTF 2021	99.64	Crypto	files wu 2
xorsa #xor-leak-factoring #bit-by-bit-factoring #rsa	PlaidCTF 2021	99.64	Crypto	files wu 3
Crypto_Artifice #xor #stegsolve	Pragyan 2021	12.69	Crypto	files wu 1
Easyphp #url-decode-discrepancy #auth-bypass #double-encoding	RCTF 2021	–	Web	files wu 1
Hi_Harmony #riscv #harmonyos #caesar-cipher	RCTF 2021	–	Reverse	files wu 1
Uncommon_Factors_II #rsa #implicit-factoring #lll (lll-lattice-reduction)	RCTF 2021	–	Crypto	files wu 1
Valgrind #vex-ir #valgrind #caesar-cipher	RCTF 2021	–	Reverse	files wu 1
dht #bruteforce #thread-race #search-pruning	RCTF 2021	–	Reverse	files wu 1
Memedrive #android #jadx #xor #base64	RITSEC 2021	–	Reverse	files wu 1
RITSEC_Hash #custom-hash #bruteforce #rockyou	RITSEC 2021	–	Crypto	files wu 2
SamuraiInfection #dna-encoding #nucleotide	RITSEC 2021	–	Reverse	files wu 1
What_an_Enigma #enigma-machine	RITSEC 2021	–	Crypto	files wu 2
snek #pyc-decompile #uncompyle6	RITSEC 2021	–	Reverse	files wu 3
Baby-RSA #rsa #factordb	S4CTF 2021	24.52	Crypto	files wu 1
Baby-Xor #xor #self-shifted-xor	S4CTF 2021	24.52	Crypto	files wu 1
rediary #cpp-reversing #custom-cipher	S4CTF 2021	24.52	Reverse	files wu 1
Sign_Wars #ecdsa #biased-nonce #lattice #mt19937	SECCON 2021	–	Crypto	files wu 1
cerberus #padding-oracle #cbc #decryption-oracle	SECCON 2021	–	Crypto	files wu 1
MiTM #diffie-hellman #meet-in-the-middle (mitm)	Securinets 2021 Quals	41.71	Crypto	files wu 1
Special #rsa #special-primes	Securinets 2021 Quals	41.71	Crypto	files wu 1
MultipleExponents #rsa #common-modulus-attack	SunshineCTF 2021	23.34	Crypto	files wu 2
Basic_RSA #rsa #factorization	TAMUctf 2021	–	Crypto	files wu 3
Calculator #arp-spoofing #meet-in-the-middle (mitm)	TAMUctf 2021	–	Pwn	files wu 3
Ciphper #xor	TAMUctf 2021	–	Crypto	files wu 3
Ring_Of_Fire #xor #logic-gates	TAMUctf 2021	–	Crypto	files wu 2
pwgen #lcg #z3	TAMUctf 2021	–	Crypto	files wu 1

Challenges