@hiikunz - AlpacaHack

hiikunz

@hiikun_Z

AUTHORED CHALLENGES

OPEN DATE	CHALLENGE	SOLVES
2026/01/11	Basic Buffer Overflow Pwn	126 solves
2026/01/08	SwapSwap Misc	205 solves
2026/01/06	Square RSA Crypto	177 solves
2026/01/02	Ruby Flag Checker Rev	200 solves
2025/12/24	Xmas Login Web	234 solves
2025/12/22	Rotten Beef Pwn	166 solves
2025/12/14	Flag Printer 2100 Rev	198 solves
2025/12/10	Alpaca Bank Web	254 solves

CTF HISTORY

START DATE	CTF	RANK
2025/07/20	AlpacaHack Round 13 (Crypto)	14 / 62
2025/07/06	AlpacaHack Round 12 (Crypto)	6 / 78
2025/05/17	AlpacaHack Round 11 (Web)	51 / 213
2025/03/01	SECCON CTF 13 決勝観戦CTF	7 / 233
2025/01/26	AlpacaHack Round 9 (Crypto)	20 / 138
2024/11/30	AlpacaHack Round 7 (Web)	73 / 458
2024/10/12	AlpacaHack Round 5 (Crypto)	14 / 247
2024/10/05	AlpacaHack Round 4 (Rev)	30 / 279
2024/09/15	AlpacaHack Round 3 (Crypto)	7 / 239
2024/09/01	AlpacaHack Round 2 (Web)	5 / 300
2024/08/18	AlpacaHack Round 1 (Pwn)	16 / 174

WRITEUPS

WRITEUP	CREATED AT
Writeup for Rotten Beef ja official Rotten Beef	3 weeks ago
Writeup for Flag Printer 2100 ja official Flag Printer 2100	last month
Writeup for Alpaca Bank ja official Alpaca Bank	last month
Writeup for minimal-waf with <link rel="prefetch"> ja minimal-waf	last year
Writeup for AlpacaHack Round 3 (Crypto) ja AlpacaHack Round 3 (Crypto)	last year

SOLVED CHALLENGES

CHALLENGE	SOLVES	SOLVED AT
free-comment Misc Daily AlpacaHack	109 solves	yesterday
I wanna be the Admin Web Daily AlpacaHack	157 solves	yesterday
Basic Buffer Overflow Pwn Daily AlpacaHack	126 solves	3 days ago
crazython Rev Daily AlpacaHack	146 solves	4 days ago
RSA2026 Crypto Daily AlpacaHack	164 solves	5 days ago
SwapSwap Misc Daily AlpacaHack	205 solves	6 days ago
secret-table Web Daily AlpacaHack	189 solves	6 days ago
Square RSA Crypto Daily AlpacaHack	177 solves	last week
jailiaj Misc Daily AlpacaHack	197 solves	last week
Encoding Basics Crypto Misc Daily AlpacaHack	206 solves	last week
Fushigi Crawler Web Daily AlpacaHack	221 solves	last week
Ruby Flag Checker Rev Daily AlpacaHack	200 solves	last week
super-tomato Crypto Daily AlpacaHack	248 solves	last week
108 Misc Daily AlpacaHack	207 solves	2 weeks ago
RBG Crypto Daily AlpacaHack	110 solves	2 weeks ago
one-p-rsa Crypto Daily AlpacaHack	177 solves	2 weeks ago
cha-ll-enge Rev Daily AlpacaHack	130 solves	2 weeks ago
simpleoverwrite Pwn Daily AlpacaHack	151 solves	2 weeks ago
Useful Machine Rev Daily AlpacaHack	137 solves	2 weeks ago
Xmas Login Web Daily AlpacaHack	234 solves	3 weeks ago
cat3 Misc Daily AlpacaHack	184 solves	3 weeks ago
Rotten Beef Pwn Daily AlpacaHack	166 solves	3 weeks ago
Log Viewer Web Daily AlpacaHack	183 solves	3 weeks ago
RSA debug? Crypto Daily AlpacaHack	165 solves	3 weeks ago
omikuji Web Daily AlpacaHack	195 solves	3 weeks ago
alloc-101 Pwn Daily AlpacaHack	187 solves	3 weeks ago
Twilight Rev Daily AlpacaHack	191 solves	4 weeks ago
login-bonus Pwn Daily AlpacaHack	212 solves	4 weeks ago
🐈 Web Daily AlpacaHack	243 solves	last month
Flag Printer 2100 Rev Daily AlpacaHack	198 solves	last month
power_obfus_royalty Rev Daily AlpacaHack	177 solves	last month
Safe Prime Crypto Daily AlpacaHack	222 solves	last month
Sugoi Flag Checker Rev Daily AlpacaHack	175 solves	last month
Alpaca Bank Web Daily AlpacaHack	254 solves	last month
Read Assembly Rev Daily AlpacaHack	250 solves	last month
hit-and-miss Misc Daily AlpacaHack	278 solves	last month
Fully Padded RSA Crypto Daily AlpacaHack	200 solves	last month
size limit Crypto Daily AlpacaHack	247 solves	last month
simpleoverflow Pwn Daily AlpacaHack	370 solves	last month
Integer Writer Pwn Daily AlpacaHack	248 solves	last month
Leaked Flag Checker Rev Daily AlpacaHack	406 solves	last month
Emojify Web Daily AlpacaHack	437 solves	last month
a fact of CTF Crypto Daily AlpacaHack	616 solves	last month
AlpacaHack 2100 Misc Daily AlpacaHack	982 solves	last month
reiwa_rot13 Crypto SECCON CTF 13 Quals	24 solves	2 months ago
luau Rev CakeCTF 2022	31 solves	2 months ago
hidden Rev AlpacaHack Round 8 (Rev)	70 solves	2 months ago
masking tape Rev AlpacaHack Round 8 (Rev)	168 solves	2 months ago
RSAMPC Crypto AlpacaHack Round 9 (Crypto)	33 solves	2 months ago
Jerry's flag checker Crypto AlpacaHack Round 13 (Crypto)	29 solves	5 months ago
Flag Sharing Crypto AlpacaHack Round 12 (Crypto)	9 solves	6 months ago
OTEC Crypto AlpacaHack Round 12 (Crypto)	38 solves	6 months ago
RSARSARSARSARSARSA Crypto AlpacaHack Round 12 (Crypto)	76 solves	6 months ago
Jackpot Web AlpacaHack Round 11 (Web)	149 solves	8 months ago
Kangaroo Pwn AlpacaHack Round 10 (Pwn)	63 solves	9 months ago
Oyster Pwn AlpacaHack Round 10 (Pwn)	119 solves	9 months ago
minimal-waf Web AlpacaHack Round 7 (Web)	23 solves	last year
str.vs.cstr Pwn CakeCTF 2022	25 solves	last year
Alpaca Poll Web AlpacaHack Round 7 (Web)	124 solves	last year
Treasure Hunt Web AlpacaHack Round 7 (Web)	257 solves	last year
MathHash Misc zer0pts CTF 2022	2 solves	last year
Rock Door Crypto CakeCTF 2022	9 solves	last year
janken vs yoshiking 2 Crypto CakeCTF 2023	15 solves	last year
NNNN Crypto AlpacaHack Round 5 (Crypto)	45 solves	last year
miniblog++ Web zer0pts CTF 2022	7 solves	last year
OpenBio Web CakeCTF 2022	19 solves	last year
Warmuprofile Web zer0pts CTF 2023	24 solves	last year
Elliptic Ring RSA Crypto zer0pts CTF 2023	4 solves	last year
Modern Rome Pwn zer0pts CTF 2022	21 solves	last year
CurveCrypto Crypto zer0pts CTF 2022	6 solves	last year
readme 2022 Misc CakeCTF 2022	13 solves	last year
SquareRNG Crypto zer0pts CTF 2023	14 solves	last year
Anti-Fermat Crypto zer0pts CTF 2022	27 solves	last year
easy_factoring Crypto zer0pts CTF 2023	27 solves	last year
aush Pwn zer0pts CTF 2023	20 solves	last year
TOWFL Cheat Web CakeCTF 2023	48 solves	last year
decompile me Rev zer0pts CTF 2023	46 solves	last year
GitFile Explorer Web zer0pts CTF 2022	42 solves	last year
vtable4b Pwn CakeCTF 2023	59 solves	last year
nimrev Rev CakeCTF 2022	76 solves	last year
CakeGEAR Web CakeCTF 2022	76 solves	last year
read-write Pwn RTACTF 2023 Spring	39 solves	last year
write Pwn RTACTF 2023 Spring	83 solves	last year
before-write Pwn RTACTF 2023 Spring	153 solves	last year
catcpy Pwn AlpacaHack Round 6 (Pwn)	138 solves	last year
inbound Pwn AlpacaHack Round 6 (Pwn)	197 solves	last year
SchnorrLCG Crypto AlpacaHack Round 5 (Crypto)	21 solves	last year
XorshiftStream Crypto AlpacaHack Round 5 (Crypto)	60 solves	last year
Simple Flag Checker Rev AlpacaHack Round 4 (Rev)	122 solves	last year
Hat Trick Crypto AlpacaHack Round 3 (Crypto)	61 solves	last year
A Dance of Add and Mul Crypto AlpacaHack Round 3 (Crypto)	71 solves	last year
Rainbow Sweet Alchemist Crypto AlpacaHack Round 3 (Crypto)	120 solves	last year
qrime Crypto AlpacaHack Round 3 (Crypto)	243 solves	last year
brand new crypto Crypto CakeCTF 2022	21 solves	last year
simple signature Crypto CakeCTF 2023	26 solves	last year
ding-dong-ting-ping Crypto CakeCTF 2023	9 solves	last year
CaaS Web AlpacaHack Round 2 (Web)	90 solves	last year
Simple Login Web AlpacaHack Round 2 (Web)	543 solves	last year
Pico Note 1 Web AlpacaHack Round 2 (Web)	75 solves	last year
hexecho Pwn AlpacaHack Round 1 (Pwn)	109 solves	last year
echo Pwn AlpacaHack Round 1 (Pwn)	328 solves	last year
frozen cake Crypto CakeCTF 2022	68 solves	last year
Country DB Web CakeCTF 2023	214 solves	last year
Reused-AES Crypto RTACTF 2023 Spring	30 solves	last year
Collision-DES Crypto RTACTF 2023 Spring	35 solves	last year
XOR-CBC Crypto RTACTF 2023 Spring	74 solves	last year
Welcome Misc	1347 solves	last year

Only archived challenges are displayed here.