CTF challenges & writeups

53 challenges · browse all techniques

Challenge	CTF	Weight	Category	Has
Encryptor_Shop #rsa-shared-prime	BCACTF 2024	–	Crypto	files wu 1
RSAEncrypter #hastad-broadcast	BCACTF 2024	–	Crypto	files wu 1
Time_Skip #scytale-cipher	BCACTF 2024	–	Crypto	files wu 1
Vinegar_Times_3 #vigenere-cipher	BCACTF 2024	–	Crypto	files wu 1
Hidden_Frequencies #run-length-encoding	BCACTF 2022	–	Crypto	files wu 2
Cipher_Mishap #octal-to-ascii-decoding	BCACTF 2021	–	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
Slightly_Harder_RSA #rsa #factordb-factorization	BCACTF 2021	–	Crypto	files wu 2
Git_Better	BCACTF 2023	–	Crypto	files wu 1
FNES_1	BCACTF 2021	–	Crypto	files wu 1
A_Stuffed_Hot_Dog	BCACTF 2025	–	Crypto	files
BMovie	BCACTF 2025	–	Crypto	files
Morse_Marsh	BCACTF 2025	–	Crypto	files
Nimber	BCACTF 2025	–	Crypto	files
Q	BCACTF 2025	–	Crypto	files
SMILES_Pleasei	BCACTF 2025	–	Crypto	files
ez_xor	BCACTF 2025	–	Crypto	files
primes	BCACTF 2025	–	Crypto	files
Cha_Cha_Slide	BCACTF 2024	–	Crypto	files
Cinnamon_Dynamics	BCACTF 2024	–	Crypto	files
Superstitious_2	BCACTF 2024	–	Crypto	files
Talk_to_Echo	BCACTF 2024	–	Crypto	files
rad_be_damned	BCACTF 2024	–	Crypto	files
Chessy_20	BCACTF 2023	–	Crypto	files
Dots_and_Dashes	BCACTF 2023	–	Crypto	files
Git_Even_Better	BCACTF 2023	–	Crypto	files
Huffffman	BCACTF 2023	–	Crypto	files
Many_Time_Pad	BCACTF 2023	–	Crypto	files
RSA_is_broken	BCACTF 2023	–	Crypto	files
Signature_I	BCACTF 2023	–	Crypto	files
Signature_II	BCACTF 2023	–	Crypto	files
Smithy	BCACTF 2023	–	Crypto	files
Superstitious	BCACTF 2023	–	Crypto	files
A_Fine_Line	BCACTF 2022	–	Crypto	files
Chessy	BCACTF 2022	–	Crypto	files
Crappy_Colonization_Corp	BCACTF 2022	–	Crypto	files
Ehrenfest	BCACTF 2022	–	Crypto	files
Funky_Factors	BCACTF 2022	–	Crypto	files

Challenges