CTF challenges & writeups

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

Challenge	CTF	Weight	Category	Has
CrackMe #reversing #hash-byte-reversal #hashcat	DaVinciCTF 2021	24.50	Reverse	files wu 3
Decode #encoding #hex-to-ascii #multi-layer-encoding	DaVinciCTF 2021	24.50	Crypto	files wu 1
RoccaPia #reversing #xor-cipher	DaVinciCTF 2021	24.50	Reverse	files wu 3
Substitution #substitution-cipher #atbash	DaVinciCTF 2021	24.50	Crypto	files wu 3
TheMoreTheLess #rsa #multi-prime #factordb	DaVinciCTF 2021	24.50	Crypto	files wu 2
hav3-i-b33n-pwn3d #elliptic-curve #private-set-intersection	DamCTF 2021	24.43	Crypto	files wu 1
md5flow #md5-collision #unicoll #hashclash #lz4 #buffer-overflow	DamCTF 2021	24.43	Crypto	files wu 1
xorpals #single-byte-xor #bruteforce	DamCTF 2021	24.43	Crypto	files wu 3
Back_to_the_Lab_1 #reversing #xor #per-substring-check	DawgCTF 2021	23.29	Reverse	files wu 1
Back_to_the_Lab_2 #labview-reversing #vi-block-diagram #network-protocol	DawgCTF 2021	23.29	Pwn	files wu 1
Back_to_the_Lab_3 #labview-reversing #bit-rotation #binary-patching	DawgCTF 2021	23.29	Reverse	files wu 1
Cooking_the_Books #classical-cipher #rot47 #cyberchef #multi-encoding	DawgCTF 2021	23.29	Crypto	files wu 1
NSTFTP #network-protocol-reversing #pcap-analysis #custom-ftp #backdoor	DawgCTF 2021	23.29	Reverse	files wu 1
Really_Secure_Algorithm #rsa #wiener-attack	DawgCTF 2021	23.29	Crypto	files wu 3
The_Obligatory_RSA_Challenge #rsa #factordb	DawgCTF 2021	23.29	Crypto	files wu 3
TrashChain #custom-hash-collision #multiplicative-hash #modular-arithmetic	DawgCTF 2021	23.29	Crypto	files wu 3
What_the_Flip #aes-cbc #bit-flipping	DawgCTF 2021	23.29	Crypto	files wu 2
Who_am_I #reversing #byte-assembly #xor	DawgCTF 2021	23.29	Reverse	files wu 1
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
Failed_Logins #reversing #string-decoding #base64	DeconstruCT.F 2021	19.69	Reverse	files wu 2
RSA-1 #rsa #rsactftool #small-factor	DeconstruCT.F 2021	19.69	Crypto	files wu 3
RSA-2 #rsa #low-exponent #cube-root	DeconstruCT.F 2021	19.69	Crypto	files wu 3
RSA-3 #rsa #wiener-attack	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
garbled #garbled-circuits #meet-in-the-middle (mitm)	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
1337crypt_v2 #lattice	DownUnderCTF 2021	–	Crypto	files src wu 1
Break_Me #ecb-oracle	DownUnderCTF 2021	–	Crypto	files wu 3
Secuchat #rsa #common-prime-gcd	DownUnderCTF 2021	–	Crypto	files wu 1
Substitution_Cipher_I #substitution-cipher	DownUnderCTF 2021	–	Crypto	files src wu 3
Substitution_Cipher_II #lagrange-interpolation	DownUnderCTF 2021	–	Crypto	files wu 1
flag_checker #z3	DownUnderCTF 2021	–	Reverse	files wu 1
power_sign #rabin #signature-forgery	DownUnderCTF 2021	–	Crypto	files src wu 1
treasure #shamir-secret-sharing	DownUnderCTF 2021	–	Crypto	files wu 1
yadlp #discrete-log	DownUnderCTF 2021	–	Crypto	files wu 1
H1 #ecdsa #weak-nonce #lattice	GoogleCTF 2021	–	Crypto	files wu 1
pythia #aes-gcm #key-commitment #partitioning-oracle	GoogleCTF 2021	–	Crypto	files wu 1
story #crc #linear-algebra #gf2	GoogleCTF 2021	–	Crypto	files wu 1

Challenges