@yu212 - AlpacaHack

yu212

@Yu_212_MC

AUTHORED CHALLENGES

OPEN DATE	CHALLENGE	SOLVES
2025/12/16	doloR Sit Amet Crypto	0 solves
2025/12/16	Noisy Channel Crypto	1 solve
2025/12/16	doloR Sit Amet Revenge Crypto	0 solves
2025/12/07	Fully Padded RSA Crypto	190 solves
2025/07/06	Flag Sharing Crypto	9 solves
2025/07/06	RSARSARSARSARSARSA Crypto	72 solves
2025/07/06	OTEC Crypto	38 solves
2025/07/06	Zero-sum game Crypto	3 solves

CTF HISTORY

START DATE	CTF	RANK
2025/07/20	AlpacaHack Round 13 (Crypto)	8 / 62
2025/05/17	AlpacaHack Round 11 (Web)	13 / 213
2025/03/23	AlpacaHack Round 10 (Pwn)	43 / 95
2025/03/01	SECCON CTF 13 決勝観戦CTF	101 / 233
2025/01/26	AlpacaHack Round 9 (Crypto)	20 / 138
2024/12/30	AlpacaHack Round 8 (Rev)	5 / 316
2024/11/30	AlpacaHack Round 7 (Web)	79 / 458
2024/11/03	AlpacaHack Round 6 (Pwn)	46 / 197
2024/10/12	AlpacaHack Round 5 (Crypto)	8 / 247
2024/09/15	AlpacaHack Round 3 (Crypto)	6 / 239
2024/09/01	AlpacaHack Round 2 (Web)	18 / 300
2024/08/18	AlpacaHack Round 1 (Pwn)	33 / 174

WRITEUPS

WRITEUP	CREATED AT
Writeup for Fully Padded RSA ja official Fully Padded RSA	3 weeks ago
AlpacaHack Round 12 (Crypto) 作問者writeup ja official Flag Sharing	6 months ago
Writeup for AlpacaHack Round 3 (Crypto) ja AlpacaHack Round 3 (Crypto)	last year
frozen cake 初心者向け解説 ja frozen cake	last year

SOLVED CHALLENGES

CHALLENGE	SOLVES	SOLVED AT
Fushigi Crawler Web Daily AlpacaHack	155 solves	yesterday
Ruby Flag Checker Rev Daily AlpacaHack	157 solves	2 days ago
super-tomato Crypto Daily AlpacaHack	190 solves	3 days ago
108 Misc Daily AlpacaHack	178 solves	5 days ago
RBG Crypto Daily AlpacaHack	99 solves	6 days ago
one-p-rsa Crypto Daily AlpacaHack	152 solves	6 days ago
cha-ll-enge Rev Daily AlpacaHack	121 solves	last week
simpleoverwrite Pwn Daily AlpacaHack	132 solves	last week
Useful Machine Rev Daily AlpacaHack	128 solves	last week
Xmas Login Web Daily AlpacaHack	206 solves	last week
cat3 Misc Daily AlpacaHack	177 solves	last week
Rotten Beef Pwn Daily AlpacaHack	154 solves	last week
Log Viewer Web Daily AlpacaHack	174 solves	2 weeks ago
RSA debug? Crypto Daily AlpacaHack	152 solves	2 weeks ago
omikuji Web Daily AlpacaHack	186 solves	2 weeks ago
alloc-101 Pwn Daily AlpacaHack	177 solves	2 weeks ago
Twilight Rev Daily AlpacaHack	182 solves	2 weeks ago
login-bonus Pwn Daily AlpacaHack	198 solves	2 weeks ago
🐈 Web Daily AlpacaHack	229 solves	2 weeks ago
Flag Printer 2100 Rev Daily AlpacaHack	185 solves	2 weeks ago
power_obfus_royalty Rev Daily AlpacaHack	164 solves	3 weeks ago
Safe Prime Crypto Daily AlpacaHack	208 solves	3 weeks ago
Sugoi Flag Checker Rev Daily AlpacaHack	165 solves	3 weeks ago
Alpaca Bank Web Daily AlpacaHack	240 solves	3 weeks ago
Read Assembly Rev Daily AlpacaHack	235 solves	3 weeks ago
hit-and-miss Misc Daily AlpacaHack	268 solves	3 weeks ago
Fully Padded RSA Crypto Daily AlpacaHack	190 solves	3 weeks ago
size limit Crypto Daily AlpacaHack	234 solves	4 weeks ago
simpleoverflow Pwn Daily AlpacaHack	345 solves	last month
Integer Writer Pwn Daily AlpacaHack	235 solves	last month
Leaked Flag Checker Rev Daily AlpacaHack	381 solves	last month
Emojify Web Daily AlpacaHack	408 solves	last month
a fact of CTF Crypto Daily AlpacaHack	571 solves	last month
AlpacaHack 2100 Misc Daily AlpacaHack	865 solves	last month
Polynomial Puzzle Crypto AlpacaHack Round 13 (Crypto)	4 solves	5 months ago
Jerr0-day Crypto AlpacaHack Round 13 (Crypto)	10 solves	5 months ago
Jerry's flag checker Crypto AlpacaHack Round 13 (Crypto)	28 solves	5 months ago
Redirector Web AlpacaHack Round 11 (Web)	27 solves	7 months ago
Jackpot Web AlpacaHack Round 11 (Web)	146 solves	7 months ago
Kangaroo Pwn AlpacaHack Round 10 (Pwn)	61 solves	9 months ago
ffmac Crypto AlpacaHack Round 9 (Crypto)	8 solves	11 months ago
Equivalent Privacy Wired Crypto AlpacaHack Round 9 (Crypto)	7 solves	11 months ago
RSAMPC Crypto AlpacaHack Round 9 (Crypto)	32 solves	11 months ago
addprimes Crypto AlpacaHack Round 9 (Crypto)	25 solves	11 months ago
subway Rev AlpacaHack Round 8 (Rev)	13 solves	last year
vcipher Rev AlpacaHack Round 8 (Rev)	26 solves	last year
hidden Rev AlpacaHack Round 8 (Rev)	69 solves	last year
masking tape Rev AlpacaHack Round 8 (Rev)	166 solves	last year
Alpaca Poll Web AlpacaHack Round 7 (Web)	122 solves	last year
Treasure Hunt Web AlpacaHack Round 7 (Web)	255 solves	last year
catcpy Pwn AlpacaHack Round 6 (Pwn)	136 solves	last year
inbound Pwn AlpacaHack Round 6 (Pwn)	196 solves	last year
GitFile Explorer Web zer0pts CTF 2022	41 solves	last year
Modern Rome Pwn zer0pts CTF 2022	20 solves	last year
Anti-Fermat Crypto zer0pts CTF 2022	27 solves	last year
NNNN Crypto AlpacaHack Round 5 (Crypto)	44 solves	last year
SchnorrLCG Crypto AlpacaHack Round 5 (Crypto)	20 solves	last year
XorshiftStream Crypto AlpacaHack Round 5 (Crypto)	59 solves	last year
Everything Silver Rev AlpacaHack Round 4 (Rev)	23 solves	last year
pytecode Rev AlpacaHack Round 4 (Rev)	23 solves	last year
Simple Flag Checker Rev AlpacaHack Round 4 (Rev)	121 solves	last year
A Dance of Add and Mul Crypto AlpacaHack Round 3 (Crypto)	69 solves	last year
Hat Trick Crypto AlpacaHack Round 3 (Crypto)	60 solves	last year
Rainbow Sweet Alchemist Crypto AlpacaHack Round 3 (Crypto)	117 solves	last year
qrime Crypto AlpacaHack Round 3 (Crypto)	240 solves	last year
ding-dong-ting-ping Crypto CakeCTF 2023	9 solves	last year
janken vs yoshiking 2 Crypto CakeCTF 2023	15 solves	last year
brand new crypto Crypto CakeCTF 2022	21 solves	last year
luau Rev CakeCTF 2022	31 solves	last year
CakeGEAR Web CakeCTF 2022	75 solves	last year
CaaS Web AlpacaHack Round 2 (Web)	88 solves	last year
Pico Note 1 Web AlpacaHack Round 2 (Web)	73 solves	last year
Simple Login Web AlpacaHack Round 2 (Web)	532 solves	last year
hexecho Pwn AlpacaHack Round 1 (Pwn)	109 solves	last year
echo Pwn AlpacaHack Round 1 (Pwn)	321 solves	last year
Cake Puzzle Rev CakeCTF 2023	19 solves	last year
mimikyu Rev zer0pts CTF 2023	13 solves	last year
read-write Pwn RTACTF 2023 Spring	37 solves	last year
1R-AES Crypto RTACTF 2023 Spring	15 solves	last year
Collision-DES Crypto RTACTF 2023 Spring	35 solves	last year
write Pwn RTACTF 2023 Spring	83 solves	last year
before-write Pwn RTACTF 2023 Spring	152 solves	last year
Reused-AES Crypto RTACTF 2023 Spring	30 solves	last year
XOR-CBC Crypto RTACTF 2023 Spring	72 solves	last year
Welcome Misc	1323 solves	last year
SquareRNG Crypto zer0pts CTF 2023	14 solves	last year
easy_factoring Crypto zer0pts CTF 2023	27 solves	last year
TOWFL Cheat Web CakeCTF 2023	47 solves	last year
decompile me Rev zer0pts CTF 2023	46 solves	last year
vtable4b Pwn CakeCTF 2023	58 solves	last year
nimrev Rev CakeCTF 2022	74 solves	last year
bofww Pwn CakeCTF 2023	34 solves	last year
frozen cake Crypto CakeCTF 2022	67 solves	last year
simple signature Crypto CakeCTF 2023	26 solves	last year
Country DB Web CakeCTF 2023	211 solves	last year

Only archived challenges are displayed here.