CTF challenges & writeups

4483 challenges · browse all techniques

Challenge	CTF	Weight	Category	Has
Limited_2 #prng-seed-bruteforce #time-based-seed	WolvCTF 2024	35.25	Crypto	files wu 1
TagSeries1 #ecb #mac-forgery	WolvCTF 2024	35.25	Crypto	files wu 2
TagSeries3 #hash-length-extension #sha1	WolvCTF 2024	35.25	Crypto	files wu 1
steps #diffie-hellman #custom-group-dlp	corCTF 2024	55.00	Crypto	files wu 1
two_wrongs #quantum-circuit-reversal #brute-force	corCTF 2024	55.00	Crypto	files wu 1
alcoholic_variety #mov-attack	hxp 2024	–	Crypto	files wu 1
cccircus #crc	hxp 2024	–	Crypto	files wu 1
circus #crc	hxp 2024	–	Crypto	files wu 1
Duality #hmac-key-length-collision	justCTF 2024 Quals	77.17	Crypto	files wu 2
interlock #interlock-mitm	justCTF 2024 Quals	77.17	Crypto	files wu 3
RSA #rsa-cube-root-attack	n00bzCTF 2024	24.23	Crypto	files wu 2
Random #unseeded-rand-prng	n00bzCTF 2024	24.23	Crypto	files wu 2
Vinegar #vigenere-cipher	n00bzCTF 2024	24.23	Crypto	files wu 3
Vinegar_2 #vigenere-cipher	n00bzCTF 2024	24.23	Crypto	files wu 2
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
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 #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
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
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
RSA_School_1st_Grade #rsa #known-prime	BlueHens 2023	24.61	Crypto	files wu 1
RSA_School_2nd_Grade #rsa #factordb	BlueHens 2023	24.61	Crypto	files wu 1
RSA_School_3rd_Grade #rsa #common-modulus-attack	BlueHens 2023	24.61	Crypto	files wu 1
RSA_School_4th_Grade #rsa #d-to-factorization	BlueHens 2023	24.61	Crypto	files wu 1
RSA_School_5th_Grade #rsa #low-exponent #cube-root	BlueHens 2023	24.61	Crypto	files wu 1
RSA_School_6th_Grade #rsa #hastad-broadcast #crt	BlueHens 2023	24.61	Crypto	files wu 1
RSA_School_7th_Grade #rsa #fermat-factorization	BlueHens 2023	24.61	Crypto	files wu 1
RSA_School_8th_Grade #rsa #fermat-factorization	BlueHens 2023	24.61	Crypto	files wu 1
Fractional_Flag #rsa-variant #wiener-lattice-attack #small-private-exponent	Cryptoverse 2023	24.52	Crypto	files wu 1

Challenges