CTF challenges & writeups

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

Challenge	CTF	Weight	Category	Has
Seed_of_Life #mt19937-seed-bruteforce	idekCTF 2021	24.56	Crypto	files wu 1
Alternating_key_exchange #meet-in-the-middle (mitm)	m0leCon 2021 Quals	24.55	Crypto	files wu 1
Another_Login #srand-seed-prediction	m0leCon 2021 Quals	24.55	Pwn	files wu 1
Giant_log #p-adic-discrete-log	m0leCon 2021 Quals	24.55	Crypto	files wu 1
Obscurity #lfsr	m0leCon 2021 Quals	24.55	Crypto	files wu 2
Obscurity-fixed #fcsr	m0leCon 2021 Quals	24.55	Crypto	files wu 1
babysign #rsa-signature-forgery	m0leCon 2021 Quals	24.55	Crypto	files wu 1
parallel-the-m0le #meet-in-the-middle (mitm)	m0leCon 2021 Quals	24.55	Reverse	files wu 3
CBC-Jail #cbc-iv-bit-flip	niteCTF 2021	–	Pwn	files wu 2
Flip_Me_Over #cbc-bit-flipping	niteCTF 2021	–	Crypto	files wu 1
Rabin_To_The_Rescue #fermat-factorization	niteCTF 2021	–	Crypto	files wu 2
baby #rsa #factordb	redpwn 2021	32.61	Crypto	files wu 1
round-the-bases #encoding #base85	redpwn 2021	32.61	Crypto	files wu 1
scissor #caesar-cipher	redpwn 2021	32.61	Crypto	files wu 1
yahtzee #aes-ctr #keystream-reuse	redpwn 2021	32.61	Crypto	files wu 1
easy_pseudo_random #blum-blum-shub #lll (lll-lattice-reduction)#lattice #msb-recovery	zer0pts 2021	24.56	Crypto	files wu 2
janken_vs_yoshiking #elgamal #quadratic-residue #legendre-symbol	zer0pts 2021	24.56	Crypto	files wu 2
not_mordell_primes #rsa #elliptic-curve #resultant #point-recovery	zer0pts 2021	24.56	Crypto	files wu 1
ot_or_not_ot #oblivious-transfer #legendre-symbol #aes-cbc	zer0pts 2021	24.56	Crypto	files wu 2
signme #rsa #signature-forgery #weak-prng #seed-bruteforce	zer0pts 2021	24.56	Crypto	files wu 1
syscall_777 #reversing #custom-syscall #xor	zer0pts 2021	24.56	Reverse	files wu 1
warsamup #rsa #franklin-reiter #related-message	zer0pts 2021	24.56	Crypto	files wu 3
Amsterdam #custom-encoding #combinatorics	Crypto 2020	–	Crypto	files src wu 1
Fatima #elliptic-curve #ecdlp	Crypto 2020	–	Crypto	files src wu 1
One Line Crypto #rsa #weak-primes	Crypto 2020	–	Crypto	files src wu 1
Three Ravens #rsa #modulus-reduction	Crypto 2020	–	Crypto	files wu 1
CookieMonster #format-string #time-seeded-canary-bypass #stack-buffer-overflow	DawgCTF 2020	23.29	Misc	files wu 3
1337crypt #goldwasser-micali #quadratic-residue	DownUnderCTF 2020	24.44	Crypto	files src wu 1
BabyRSA #rsa #euler-theorem	DownUnderCTF 2020	24.44	Crypto	files src wu 1
Extra Cool Block Chaining #custom-block-cipher-mode #decryption-oracle	DownUnderCTF 2020	24.44	Crypto	files src wu 1
Hex Cipher Shift #substitution-cipher #constraint-solving	DownUnderCTF 2020	24.44	Crypto	files src wu 1
ROT-I #caesar-cipher	DownUnderCTF 2020	24.44	Crypto	files src wu 1
impECCable #ecdsa #signature-forgery	DownUnderCTF 2020	24.44	Crypto	files src wu 1
tracing #timing-attack #binary-search-tree #rust	GoogleCTF 2020	–	Misc	files wu 1
MPKC #multivariate-crypto #linear-part-recovery #groebner-basis	PlaidCTF 2020	93.15	Crypto	files wu 2
MoozChat #command-injection #jwt #weak-diffie-hellman #meet-in-the-middle (mitm)	PlaidCTF 2020	93.15	Web	files wu 1
dyrpto #coppersmith-short-pad #franklin-reiter #rsa #small-e	PlaidCTF 2020	93.15	Crypto	files wu 2
reee #self-unpacking #z3	PlaidCTF 2020	93.15	Reverse	files wu 3
sidhe #sidh #adaptive-key-recovery #static-key-reuse	PlaidCTF 2020	93.15	Crypto	files wu 3
stegasaurus-scratch #combinatorial-encoding #card-trick-protocol	PlaidCTF 2020	93.15	Crypto	files wu 3

Challenges