CTF challenges & writeups

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

Challenge	CTF	Weight	Category	Has
no_write #syscall-filter #strncmp-oracle #stack-pivot	RCTF 2020	–	Misc	files wu 1
detective #arbitrary-write #oracle	TSG 2020	–	Misc	files wu 3
EXCELlent #constraint-solving	hxp 2020	94.00	Reverse	files wu 2
hackme #parser-differential	hxp 2020	94.00	Web	files wu 3
hyper #hyperelliptic-curve	hxp 2020	94.00	Crypto	files wu 2
hyperhyper #weil-pairing	hxp 2020	94.00	Crypto	files wu 1
minithorpe #hash-reversal	hxp 2020	94.00	Crypto	files wu 1
nanothorpe #length-extension	hxp 2020	94.00	Crypto	files wu 2
nobranch7e4 #linear-algebra	hxp 2020	94.00	Reverse	files wu 1
octothorpe #hash-collision	hxp 2020	94.00	Crypto	files wu 1
GuessingGame1 #unseeded-rand #prng-prediction #rop	picoCTF 2020	–	Pwn	files wu 1
OTPImplementation #z3 #character-jumbling #xor	picoCTF 2020	–	Reverse	files wu 1
kevin-higgs #bit-flip #arbitrary-bit-flip	redpwn 2020	22.63	Misc	files wu 1
syscall_kit #syscall #mprotect #shellcode	zer0pts 2020	24.56	Misc	files wu 1
Silk_road_I #input-constraint-cracking #bruteforce	ASIS 2019 Quals	61.07	Misc	files wu 2
Bit #bit-flip	HSCTF 2019	–	Misc	files wu 1
SuperSecureVault #crt #modular-arithmetic	Pragyan 2019	20.69	Misc	files wu 1
Onion Layer Encoding #base64 #base32 #encoding	RITSEC 2019	–	Misc	files src wu 1
Take it to the cleaners #exif #base64 #rot13	RITSEC 2019	–	Forensics	files src wu 1
PPowerenCryption #shellcode #powerpc #xor-encoding	UTCTF 2019	–	Misc	files wu 3
Classy_Cipher #caesar-cipher #bruteforce	angstromCTF 2019	–	Crypto	files wu 1
Half_and_Half #xor #known-plaintext	angstromCTF 2019	–	Crypto	files wu 1
Lattice_ZKP #lattice #zero-knowledge-proof	angstromCTF 2019	–	Crypto	files wu 1
MAC_Forgery #cbc-mac #mac-forgery	angstromCTF 2019	–	Crypto	files wu 1
One_Bite #xor	angstromCTF 2019	–	Reverse	files wu 1
Paint #diffie-hellman	angstromCTF 2019	–	Crypto	files wu 1
Powerball #rsa #oblivious-transfer	angstromCTF 2019	–	Crypto	files wu 1
Really_Secure_Algorithm #rsa	angstromCTF 2019	–	Crypto	files wu 1
Runes #paillier #factordb	angstromCTF 2019	–	Crypto	files wu 1
WALL-E #rsa #small-e	angstromCTF 2019	–	Crypto	files wu 1
p&q Service #rsa	justCTF 2019	24.85	Crypto	files src wu 1
AES-ABC #aes-ecb #ecb-penguin #custom-block-chaining #ppm-image	picoCTF 2019	–	Crypto	files wu 3
Easy1 #vigenere	picoCTF 2019	–	Crypto	files wu 1
Flags #maritime-signal-flags	picoCTF 2019	–	Crypto	files wu 1
Mr-Worldwide #gps-coordinates #geolocation	picoCTF 2019	–	Crypto	files wu 1
TheNumbers #a1z26	picoCTF 2019	–	Crypto	files wu 1
john_pollard #rsa #small-modulus-factoring #x509-certificate	picoCTF 2019	–	Crypto	files wu 2
miniRSA #rsa #small-e #cube-root	picoCTF 2019	–	Crypto	files wu 1
seed-sPRiNG #srand-time-seed #prng-prediction	picoCTF 2019	–	Pwn	files wu 1
vault-door-5 #base64 #url-encoding	picoCTF 2019	–	Reverse	files wu 1

Challenges