CTF challenges & writeups

105 challenges in family ⊕ crypto:encoding ✕ clear · browse all techniques

Challenge	CTF	Weight	Category	Has
TheMostWorthyDistinctionOfPain #dictionary-encoding	BYUCTF 2022	–	Crypto	files wu 2
TruthAndFalsehood #nested-base64	BYUCTF 2022	–	Crypto	files src wu 1
blazingfast #web #xss #unicode-normalization	DiceCTF 2022	24.82	Web	files wu 2
umassdining #dom-based-xss #csp-bypass #double-encoding	UMassCTF 2022	23.56	Web	files wu 2
EbookDRM #ld-preload #binary-patching #library-hooking	UTCTF 2022	–	Reverse	files wu 1
gambler_baby #predictable-prng #weak-seeding #binary-patching	b01lers 2022	33.05	Pwn	files wu 1
BinaryFlood #reversing #binary-diffing	vsCTF 2022	23.32	Reverse	files wu 1
Recovery #base64 #constraint-solving	vsCTF 2022	23.32	Crypto	files wu 2
Cipher_Mishap #octal-to-ascii-decoding	BCACTF 2021	–	Crypto	files wu 2
A_Pain_in_the_BACnet #pcap-analysis #bacnet #scapy #protocol-parsing	CSAW 2021 Quals	20.54	Hardware	files wu 3
Bits #rsa #lsb-oracle #discrete-log #binary-search-factoring	CSAW 2021 Quals	20.54	Crypto	files wu 3
Rima #custom-encoding-reversal #base5	Crypto 2021	36.00	Misc	files wu 2
Decode #encoding #hex-to-ascii #multi-layer-encoding	DaVinciCTF 2021	24.50	Crypto	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
Failed_Logins #reversing #string-decoding #base64	DeconstruCT.F 2021	19.69	Reverse	files wu 2
The_Conspiracy #base64 #geo-coordinates #country-lookup	DeconstruCT.F 2021	19.69	Crypto	files wu 3
Super_Super_Mario #static-binary-patching	ICHSA 2021	–	Reverse	files wu 2
Thnks_fr_th_Pwds #base64-encoding	MetaCTF 2021	–	Crypto	files wu 3
Easyphp #url-decode-discrepancy #auth-bypass #double-encoding	RCTF 2021	–	Web	files wu 1
Memedrive #android #jadx #xor #base64	RITSEC 2021	–	Reverse	files wu 1
SamuraiInfection #dna-encoding #nucleotide	RITSEC 2021	–	Reverse	files wu 1
SEA_LANGUAGE_1 #morse-code	TFC 2021	–	Crypto	files wu 3
SEA_LANGUAGE_2 #morse-code	TFC 2021	–	Crypto	files wu 3
Baby_Encoder #encoding #xor	TMUCTF 2021	–	Crypto	files wu 1
EasyPeasy #base64 #encoding	Tenable 2021	22.37	Crypto	files wu 1
back_to_basics #base-conversion	UIUCTF 2021	–	Crypto	files wu 3
Whose_Base_Is_It_Anyway #base-conversion	UMDCTF 2021	–	Crypto	files wu 2
CipherGauntlet #multi-layer-encoding #caesar-cipher	UTCTF 2021	–	Crypto	files wu 3
File.tetr #custom-encoding #run-length-encoding	UTCTF 2021	–	Reverse	files wu 1
Rotations #binary-patching #caesar-cipher	VishwaCTF 2021	–	Reverse	files wu 2
Retrosynthesis #binary-patching	idekCTF 2021	24.56	Reverse	files wu 1
stegasaurus-scratch #combinatorial-encoding #card-trick-protocol	PlaidCTF 2020	93.15	Crypto	files wu 3
syscall_kit #syscall #mprotect #shellcode	zer0pts 2020	24.56	Misc	files wu 1
PPowerenCryption #shellcode #powerpc #xor-encoding	UTCTF 2019	–	Misc	files wu 3
vault-door-5 #base64 #url-encoding	picoCTF 2019	–	Reverse	files wu 1
Cryptografie #java-reflection #filesystempreferences-encoding	plfanzen 2026	25.00	Crypto	files wu 1
Mind_Boggle #brainfuck #nested-encoding	BuckeyeCTF 2025	–	Misc	files wu 1

Challenges