CTF challenges & writeups

199 challenges in family ⊕ crypto:other ✕ clear · browse all techniques

Challenge	CTF	Weight	Category	Has
Diffecient #hash-collision #bloom-filter #murmurhash3	SekaiCTF 2022	24.86	Crypto	files wu 1
SecureImageEncryption #permutation-cipher #chosen-plaintext	SekaiCTF 2022	24.86	Crypto	files wu 1
DIY_Crypto #aes #custom-sbox	Tenable 2022	22.37	Crypto	files wu 1
Wifi_Password_of_The_Day #crime #compression-oracle	Tenable 2022	22.37	Crypto	files wu 1
Non-textualTroubles #shift-cipher	UACTF 2022	–	Crypto	files wu 2
Sunset #subset-sum #convolution	UTCTF 2022	–	Crypto	files wu 2
tadpole #lcg #modulus-recovery	corCTF 2022	24.92	Crypto	files wu 2
anti_fermat #rsa #factorization #known-sum #bit-complement	zer0pts 2022	35.97	Crypto	files wu 3
Nostego #png-bit-transform #visual-recovery	ALLES 2021	–	Crypto	files wu 1
DamaS #rsa #boneh-durfee #small-private-exponent #coppersmith	ASIS 2021 Quals	89.22	Crypto	files wu 1
nDLP #discrete-logarithm #composite-modulus #pohlig-hellman #crt	ASIS 2021 Finals	89.22	Crypto	files wu 2
Easy_RSA #rsa #textbook-decryption	BCACTF 2021	–	Crypto	files wu 3
Little_e #rsa #small-exponent-e=3 #cube-root-attack	BCACTF 2021	–	Crypto	files wu 1
Sailing_Thru_Decryption #signal-flag-decoding #binary #vigenere-cipher	BCACTF 2021	–	Crypto	files wu 2
OTP1 #repeating-key-xor #xortool	BlueHens 2021	22.62	Crypto	files wu 1
OTP3 #two-time-pad #key-reuse	BlueHens 2021	22.62	Crypto	files wu 1
Crack_Me #hash-cracking #salted-sha256 #hashcat	CSAW 2021 Quals	20.54	Crypto	files wu 3
Forgery #elgamal-signature #existential-forgery #unhashed-message #mask-bypass	CSAW 2021 Quals	20.54	Crypto	files src wu 3
DoRSA #rsa #wiener-attack #continued-fractions	Crypto 2021	36.00	Misc	files wu 1
md5flow #md5-collision #unicoll #hashclash #lz4 #buffer-overflow	DamCTF 2021	24.43	Crypto	files wu 1
Cooking_the_Books #classical-cipher #rot47 #cyberchef #multi-encoding	DawgCTF 2021	23.29	Crypto	files wu 1
TrashChain #custom-hash-collision #multiplicative-hash #modular-arithmetic	DawgCTF 2021	23.29	Crypto	files wu 3
Code_Decode #substitution-cipher #embedded-key	DeconstruCT.F 2021	19.69	Crypto	files wu 3
Doe_a_deer #solfa-cipher #music-cipher	DeconstruCT.F 2021	19.69	Crypto	files wu 1
RSA-1 #rsa #rsactftool #small-factor	DeconstruCT.F 2021	19.69	Crypto	files wu 3
The_Conspiracy #base64 #geo-coordinates #country-lookup	DeconstruCT.F 2021	19.69	Crypto	files wu 3
benaloh #benaloh-cryptosystem #lcg-nonce #higher-residuosity	DiceCTF 2021	24.82	Crypto	files wu 1
signature-sheep-scheming-signature-schemes #lattice-signature #mask-recovery	DiceCTF 2021	24.82	Crypto	files wu 1
Vencryption #vimcrypt	HacktivityCon 2021	–	Crypto	files wu 2
Lines #multiplicative-cipher	ImaginaryCTF 2021	–	Crypto	files wu 2
New_Technology #weak-key-derivation	ImaginaryCTF 2021	–	Crypto	files wu 2
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
Uncommon_Factors_II #rsa #implicit-factoring #lll (lll-lattice-reduction)	RCTF 2021	–	Crypto	files wu 1
RITSEC_Hash #custom-hash #bruteforce #rockyou	RITSEC 2021	–	Crypto	files wu 2
What_an_Enigma #enigma-machine	RITSEC 2021	–	Crypto	files wu 2
snek #pyc-decompile #uncompyle6	RITSEC 2021	–	Reverse	files wu 3
Baby-Xor #xor #self-shifted-xor	S4CTF 2021	24.52	Crypto	files wu 1
Special #rsa #special-primes	Securinets 2021 Quals	41.71	Crypto	files wu 1
Ring_Of_Fire #xor #logic-gates	TAMUctf 2021	–	Crypto	files wu 2

Challenges