@hiikunz - AlpacaHack

hiikunz

@hiikun_Z

AUTHORED CHALLENGES

OPEN DATE	CHALLENGE	SOLVES
2026/03/08	iwashi Crypto	32 solves
2026/02/13	simple ROP Pwn	101 solves
2026/02/11	AAAAAAAAEEEEEEEESSSSSSSS Crypto	114 solves
2026/02/07	Compressor Misc	104 solves
2026/01/21	Animal Viewer Web	148 solves
2026/01/17	dice roll Web	192 solves
2026/01/14	Five Alpacas Crypto	184 solves
2026/01/11	Basic Buffer Overflow Pwn	170 solves
2026/01/08	SwapSwap Misc	259 solves
2026/01/06	Square RSA Crypto	219 solves
2026/01/02	Ruby Flag Checker Rev	269 solves
2025/12/24	Xmas Login Web	321 solves
2025/12/22	Rotten Beef Pwn	192 solves
2025/12/14	Flag Printer 2100 Rev	233 solves
2025/12/10	Alpaca Bank Web	308 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 pyjs ja pyjs	2 weeks ago
Writeup for Rotten Beef ja official Rotten Beef	2 months ago
Writeup for Flag Printer 2100 ja official Flag Printer 2100	3 months ago
Writeup for Alpaca Bank ja official Alpaca Bank	3 months ago
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
The future path Crypto Daily AlpacaHack	79 solves	yesterday
flag.txt Misc Daily AlpacaHack	92 solves	2 days ago
Single Hint RSA Crypto tkbctf5	115 solves	3 days ago
Double Hint RSA Crypto tkbctf5	30 solves	3 days ago
README.pdf Rev tkbctf5	140 solves	3 days ago
Heuristic IPPON Misc Daily AlpacaHack	134 solves	3 days ago
memset note Pwn Daily AlpacaHack B-SIDE	34 solves	4 days ago
Another Login Challenge Web Daily AlpacaHack	98 solves	4 days ago
kappa overflow Pwn Daily AlpacaHack	103 solves	5 days ago
Find XOR key Crypto Daily AlpacaHack	106 solves	6 days ago
iwashi Crypto Daily AlpacaHack B-SIDE	32 solves	last week
💯 Misc Daily AlpacaHack	101 solves	last week
FLAG OVER Misc Daily AlpacaHack	102 solves	last week
guess.js Misc Daily AlpacaHack	89 solves	last week
high and low Crypto Daily AlpacaHack	78 solves	last week
magic number Misc Daily AlpacaHack	105 solves	last week
Resume Maker Web Daily AlpacaHack B-SIDE	46 solves	last week
Alert my Flag Web Daily AlpacaHack	132 solves	last week
Flag Printer 2026 Misc Daily AlpacaHack	156 solves	last week
glibc's secret function Rev Daily AlpacaHack	153 solves	2 weeks ago
Bars Web Daily AlpacaHack	214 solves	2 weeks ago
9️⃣ Misc Daily AlpacaHack B-SIDE	45 solves	2 weeks ago
pyjs Misc Daily AlpacaHack	77 solves	2 weeks ago
Rock Paper Scissors Lizard Spock Web Daily AlpacaHack	88 solves	2 weeks ago
One Byte Padding Oracle Attack Crypto Daily AlpacaHack	69 solves	2 weeks ago
useful-gadget Pwn Daily AlpacaHack B-SIDE	43 solves	2 weeks ago
Alpaca Rangers Web Daily AlpacaHack	132 solves	2 weeks ago
addprimes Crypto AlpacaHack Round 9 (Crypto)	27 solves	3 weeks ago
hit-and-hit Misc Daily AlpacaHack	81 solves	3 weeks ago
Iron Door Crypto CakeCTF 2023	7 solves	3 weeks ago
Alpaca Quest Rev Daily AlpacaHack	107 solves	3 weeks ago
dual_summon Crypto SECCON CTF 13 Quals	9 solves	3 weeks ago
Tidal wave Crypto SECCON CTF 13 Quals	5 solves	3 weeks ago
Noob programmer Pwn Daily AlpacaHack	93 solves	3 weeks ago
xiyi Crypto SECCON CTF 13 Quals	3 solves	3 weeks ago
seqr Crypto SECCON CTF 13 Quals	2 solves	3 weeks ago
Stealerusk Rev Daily AlpacaHack B-SIDE	40 solves	3 weeks ago
CopperCopperCopper Crypto Daily AlpacaHack	86 solves	3 weeks ago
doloR Sit Amet Revenge Crypto	2 solves	3 weeks ago
Dancing Cursor Rev Misc Daily AlpacaHack	101 solves	3 weeks ago
doloR Sit Amet Crypto	2 solves	3 weeks ago
Pickle Loader Misc Daily AlpacaHack	111 solves	3 weeks ago
Disappeared Pwn Daily AlpacaHack	105 solves	3 weeks ago
ECRSA Crypto Daily AlpacaHack B-SIDE	45 solves	3 weeks ago
wages of sin() Rev Misc Daily AlpacaHack	86 solves	4 weeks ago
Alpaillier Crypto Daily AlpacaHack	112 solves	4 weeks ago
You are being redirected Web Daily AlpacaHack	109 solves	last month
simple ROP Pwn Daily AlpacaHack	101 solves	last month
ret2basics Pwn Daily AlpacaHack B-SIDE	39 solves	last month
nc magic Misc Daily AlpacaHack	127 solves	last month
AAAAAAAAEEEEEEEESSSSSSSS Crypto Daily AlpacaHack	114 solves	last month
destructuring Misc Daily AlpacaHack	135 solves	last month
Alpaca-Llama Ranch Pwn Daily AlpacaHack	114 solves	last month
invisible-grep Misc Daily AlpacaHack B-SIDE	37 solves	last month
Plz Login Web Daily AlpacaHack	208 solves	last month
Compressor Misc Daily AlpacaHack	104 solves	last month
misdirection Rev Daily AlpacaHack	148 solves	last month
The World Misc Daily AlpacaHack	176 solves	last month
HellCouple Crypto Daily AlpacaHack B-SIDE	66 solves	last month
RRe_Time_Limiter Crypto Daily AlpacaHack	168 solves	last month
Magic Engine Web Daily AlpacaHack	245 solves	last month
read-a-binary Rev Daily AlpacaHack	209 solves	last month
Substance Crypto Daily AlpacaHack	228 solves	last month
Inu Profile Web Daily AlpacaHack B-SIDE	88 solves	last month
optimal-sort Misc Daily AlpacaHack	98 solves	last month
Linear Coffee Generator Crypto Daily AlpacaHack	109 solves	last month
shellcode-101 Pwn Daily AlpacaHack	123 solves	last month
No JS Web Daily AlpacaHack	126 solves	last month
ToyPQC Crypto Daily AlpacaHack	103 solves	last month
git gc Misc Daily AlpacaHack	144 solves	last month
Stateless Auth Web Daily AlpacaHack	161 solves	last month
Paca Paca Authenticator Crypto Daily AlpacaHack	120 solves	last month
Bashrunner Misc Daily AlpacaHack	116 solves	last month
Animal Viewer Web Daily AlpacaHack	148 solves	last month
dockerstack Misc Daily AlpacaHack	172 solves	last month
system-v Rev Daily AlpacaHack	115 solves	last month
ChaChaCha Crypto Daily AlpacaHack	152 solves	last month
dice roll Web Daily AlpacaHack	192 solves	last month
Base Length Misc Daily AlpacaHack	148 solves	last month
Short Writer Pwn Daily AlpacaHack	116 solves	2 months ago
Five Alpacas Crypto Daily AlpacaHack	184 solves	2 months ago
free-comment Misc Daily AlpacaHack	145 solves	2 months ago
I wanna be the Admin Web Daily AlpacaHack	261 solves	2 months ago
Basic Buffer Overflow Pwn Daily AlpacaHack	170 solves	2 months ago
crazython Rev Daily AlpacaHack	173 solves	2 months ago
RSA2026 Crypto Daily AlpacaHack	197 solves	2 months ago
SwapSwap Misc Daily AlpacaHack	259 solves	2 months ago
secret-table Web Daily AlpacaHack	250 solves	2 months ago
Square RSA Crypto Daily AlpacaHack	219 solves	2 months ago
jailiaj Misc Daily AlpacaHack	260 solves	2 months ago
Encoding Basics Misc Crypto Daily AlpacaHack	289 solves	2 months ago
Fushigi Crawler Web Daily AlpacaHack	314 solves	2 months ago
Ruby Flag Checker Rev Daily AlpacaHack	269 solves	2 months ago
super-tomato Crypto Daily AlpacaHack	356 solves	2 months ago
108 Misc Daily AlpacaHack	272 solves	2 months ago
RBG Crypto Daily AlpacaHack	120 solves	2 months ago
one-p-rsa Crypto Daily AlpacaHack	214 solves	2 months ago
cha-ll-enge Rev Daily AlpacaHack	147 solves	2 months ago
simpleoverwrite Pwn Daily AlpacaHack	181 solves	2 months ago
Useful Machine Rev Daily AlpacaHack	153 solves	2 months ago
Xmas Login Web Daily AlpacaHack	321 solves	2 months ago
cat3 Misc Daily AlpacaHack	208 solves	2 months ago
Rotten Beef Pwn Daily AlpacaHack	192 solves	2 months ago
Log Viewer Web Daily AlpacaHack	215 solves	2 months ago
RSA debug? Crypto Daily AlpacaHack	181 solves	2 months ago
omikuji Web Daily AlpacaHack	234 solves	2 months ago
alloc-101 Pwn Daily AlpacaHack	207 solves	2 months ago
Twilight Rev Daily AlpacaHack	219 solves	2 months ago
login-bonus Pwn Daily AlpacaHack	237 solves	2 months ago
🐈 Web Daily AlpacaHack	291 solves	3 months ago
Flag Printer 2100 Rev Daily AlpacaHack	233 solves	3 months ago
power_obfus_royalty Rev Daily AlpacaHack	195 solves	3 months ago
Safe Prime Crypto Daily AlpacaHack	241 solves	3 months ago
Sugoi Flag Checker Rev Daily AlpacaHack	195 solves	3 months ago
Alpaca Bank Web Daily AlpacaHack	308 solves	3 months ago
Read Assembly Rev Daily AlpacaHack	298 solves	3 months ago
hit-and-miss Misc Daily AlpacaHack	359 solves	3 months ago
Fully Padded RSA Crypto Daily AlpacaHack	224 solves	3 months ago
size limit Crypto Daily AlpacaHack	294 solves	3 months ago
simpleoverflow Pwn Daily AlpacaHack	463 solves	3 months ago
Integer Writer Pwn Daily AlpacaHack	301 solves	3 months ago
Leaked Flag Checker Rev Daily AlpacaHack	520 solves	3 months ago
Emojify Web Daily AlpacaHack	541 solves	3 months ago
a fact of CTF Crypto Daily AlpacaHack	804 solves	3 months ago
AlpacaHack 2100 Misc Daily AlpacaHack	1435 solves	3 months ago
reiwa_rot13 Crypto SECCON CTF 13 Quals	29 solves	4 months ago
luau Rev CakeCTF 2022	34 solves	4 months ago
hidden Rev AlpacaHack Round 8 (Rev)	71 solves	4 months ago
masking tape Rev AlpacaHack Round 8 (Rev)	173 solves	4 months ago
RSAMPC Crypto AlpacaHack Round 9 (Crypto)	35 solves	4 months ago
Jerry's flag checker Crypto AlpacaHack Round 13 (Crypto)	32 solves	8 months ago
Flag Sharing Crypto AlpacaHack Round 12 (Crypto)	10 solves	8 months ago
OTEC Crypto AlpacaHack Round 12 (Crypto)	39 solves	8 months ago
RSARSARSARSARSARSA Crypto AlpacaHack Round 12 (Crypto)	79 solves	8 months ago
Jackpot Web AlpacaHack Round 11 (Web)	159 solves	10 months ago
Kangaroo Pwn AlpacaHack Round 10 (Pwn)	66 solves	11 months ago
Oyster Pwn AlpacaHack Round 10 (Pwn)	125 solves	11 months ago
minimal-waf Web AlpacaHack Round 7 (Web)	25 solves	last year
str.vs.cstr Pwn CakeCTF 2022	27 solves	last year
Alpaca Poll Web AlpacaHack Round 7 (Web)	129 solves	last year
Treasure Hunt Web AlpacaHack Round 7 (Web)	266 solves	last year
MathHash Misc zer0pts CTF 2022	3 solves	last year
Rock Door Crypto CakeCTF 2022	10 solves	last year
janken vs yoshiking 2 Crypto CakeCTF 2023	16 solves	last year
NNNN Crypto AlpacaHack Round 5 (Crypto)	48 solves	last year
miniblog++ Web zer0pts CTF 2022	11 solves	last year
OpenBio Web CakeCTF 2022	21 solves	last year
Warmuprofile Web zer0pts CTF 2023	27 solves	last year
Elliptic Ring RSA Crypto zer0pts CTF 2023	5 solves	last year
Modern Rome Pwn zer0pts CTF 2022	24 solves	last year
CurveCrypto Crypto zer0pts CTF 2022	6 solves	last year
readme 2022 Misc CakeCTF 2022	14 solves	last year
SquareRNG Crypto zer0pts CTF 2023	15 solves	last year
Anti-Fermat Crypto zer0pts CTF 2022	30 solves	last year
easy_factoring Crypto zer0pts CTF 2023	29 solves	last year
aush Pwn zer0pts CTF 2023	22 solves	last year
TOWFL Web Cheat CakeCTF 2023	50 solves	last year
decompile me Rev zer0pts CTF 2023	48 solves	last year
GitFile Explorer Web zer0pts CTF 2022	47 solves	last year
vtable4b Pwn CakeCTF 2023	61 solves	last year
nimrev Rev CakeCTF 2022	79 solves	last year
CakeGEAR Web CakeCTF 2022	79 solves	last year
read-write Pwn RTACTF 2023 Spring	41 solves	last year
write Pwn RTACTF 2023 Spring	85 solves	last year
before-write Pwn RTACTF 2023 Spring	160 solves	last year
catcpy Pwn AlpacaHack Round 6 (Pwn)	144 solves	last year
inbound Pwn AlpacaHack Round 6 (Pwn)	205 solves	last year
SchnorrLCG Crypto AlpacaHack Round 5 (Crypto)	22 solves	last year
XorshiftStream Crypto AlpacaHack Round 5 (Crypto)	63 solves	last year
Simple Flag Checker Rev AlpacaHack Round 4 (Rev)	125 solves	last year
Hat Trick Crypto AlpacaHack Round 3 (Crypto)	66 solves	last year
A Dance of Add and Mul Crypto AlpacaHack Round 3 (Crypto)	74 solves	last year
Rainbow Sweet Alchemist Crypto AlpacaHack Round 3 (Crypto)	124 solves	last year
qrime Crypto AlpacaHack Round 3 (Crypto)	250 solves	last year
brand new crypto Crypto CakeCTF 2022	24 solves	last year
simple signature Crypto CakeCTF 2023	28 solves	last year
ding-dong-ting-ping Crypto CakeCTF 2023	9 solves	last year
CaaS Web AlpacaHack Round 2 (Web)	92 solves	last year
Simple Login Web AlpacaHack Round 2 (Web)	594 solves	last year
Pico Note 1 Web AlpacaHack Round 2 (Web)	80 solves	last year
hexecho Pwn AlpacaHack Round 1 (Pwn)	112 solves	last year
echo Pwn AlpacaHack Round 1 (Pwn)	348 solves	last year
frozen cake Crypto CakeCTF 2022	70 solves	last year
Country DB Web CakeCTF 2023	220 solves	last year
Reused-AES Crypto RTACTF 2023 Spring	33 solves	last year
Collision-DES Crypto RTACTF 2023 Spring	37 solves	last year
XOR-CBC Crypto RTACTF 2023 Spring	77 solves	last year
Welcome Misc	1502 solves	last year

Only archived challenges are displayed here.