CTF challenges & writeups

7364 challenges · browse all techniques

Challenge	CTF	Weight	Category	Has
Eggs_Over_Easy #whitespace-steganography	BlueHens 2026	44.77	Crypto	files wu 1
XORDECRYPT #chained-xor #cipher-feedback	BlueHens 2026	44.77	Crypto	files wu 1
AlphaCode #custom-dsl-reversing #opcode-fuzzing	BoroCTF 2026	–	Reverse	files wu 1
Fix_Your_Ship #file-repair	JerseyCTF 2026	37.00	Forensics	files wu 1
Recovered_Signal_File #caesar-cipher	JerseyCTF 2026	37.00	Forensics	files wu 1
qaStaH_nuq #http-object-extraction	JerseyCTF 2026	37.00	Forensics	files wu 1
1+1_3 #groth16-proof-forgery	L3akCTF 2026	34.47	Crypto	files wu 1
A_Fine_Product #safe-prime-factorization	L3akCTF 2026	34.47	Crypto	files wu 1
BabyLCG #lcg-state-recovery	L3akCTF 2026	34.47	Crypto	files wu 1
Blunder #chess-notation-stego	L3akCTF 2026	34.47	Misc	files wu 1
Bosh #fault-injection-oracle	L3akCTF 2026	34.47	Pwn	files wu 1
CSC265 #oblivious-transfer-attack	L3akCTF 2026	34.47	Crypto	files wu 1
Immiscible #oil-and-vinegar	L3akCTF 2026	34.47	Crypto	files wu 1
LattiaVM #vm-stack-pointer-corruption	L3akCTF 2026	34.47	Pwn	files wu 1
LattiaVM_2 #vm-stack-pointer-corruption	L3akCTF 2026	34.47	Pwn	files wu 1
Piet #stack-depth-alias-primitive	L3akCTF 2026	34.47	Pwn	files wu 1
Piet_2 #saved-rbp-pivot	L3akCTF 2026	34.47	Pwn	files wu 1
RSA_Eclipse #primes-near-power-of-two	L3akCTF 2026	34.47	Crypto	files wu 1
Rudimentary_Calculator #null-byte-stack-leak	L3akCTF 2026	34.47	Pwn	files wu 1
Supervisor #seccomp-notify-escape	L3akCTF 2026	34.47	Pwn	files wu 1
You_Scanned_WHAT #sinogram-reconstruction	L3akCTF 2026	34.47	Forensics	files wu 2
po1337nomial_revenge #mersenne-twister-untemper	L3akCTF 2026	34.47	Crypto	files wu 1
Blinky #pointer-authentication #speculative-execution #cache-side-channel #mips	R3CTF 2026	35.95	Misc	files wu 1
HEuristic #ckks #microsoft-seal #approximate-common-divisor #lattice	R3CTF 2026	35.95	Misc	files wu 1
Tsukis_Rhythm_Game #pyinstaller #aes-cbc #marshal-bytecode #malware-c2	R3CTF 2026	35.95	Misc	files wu 1
mafuyuuuuu #xoshiro256 #prng-state-recovery #dotnet-random	R3CTF 2026	35.95	Misc	files wu 1
r3ticket #lagrange-interpolation #negative-index #linear-algebra	R3CTF 2026	35.95	Misc	files wu 1
trustedhash #tpm2 #remote-attestation #sealed-object #pcr	R3CTF 2026	35.95	Misc	files wu 1
Buried_Treasure #multi-stage-unpacking #memfd-create #xor #strace-dump	RITSEC 2026	–	Reverse	files wu 1
T_reasure_Chest #xtea	RITSEC 2026	–	Reverse	files wu 1
doMonkeysSwim #static-rop #stack-buffer-overflow #stack-pivot #syscall	RITSEC 2026	–	Pwn	files wu 1
impossibler_pygolf #micropython #code-golf #grep-mbedtls-test-vector	RITSEC 2026	–	Misc	files wu 1
not_quite_optimal #gmp #tetration #power-tower	RITSEC 2026	–	Reverse	files wu 1
obfpyscated #python-obfuscation #xor #aes	RITSEC 2026	–	Reverse	files wu 1
F_K #brainfuck #timing-side-channel	ScriptCTF 2026	–	Reverse	files wu 1
Misdirection #bacon-cipher #24-letter-alphabet	ScriptCTF 2026	–	Crypto	files wu 1
loud_packets #network-forensics #pcap #spectrogram	TJCTF 2026	–	Forensics	files wu 1
rotated #reversing #byte-rotation	TJCTF 2026	–	Reverse	files wu 1
quant #quantum-computing #grovers-algorithm	UMDCTF 2026	–	Misc	files wu 1
The_Accursed_Lego_Bin #rsa #low-public-exponent #prng-seed-recovery	UMassCTF 2026	65.95	Crypto	files wu 1

Challenges