@kurenaif - AlpacaHack

kurenaif

@fwarashi

AUTHORED CHALLENGES

OPEN DATE	CHALLENGE	SOLVES
2026/03/24	crypto_666 Crypto	94 solves
2026/02/25	One Byte Padding Oracle Attack Crypto	73 solves
2026/01/04	Encoding Basics Misc Crypto	307 solves
2024/11/23	reiwa_rot13 Crypto	29 solves
2024/11/23	dual_summon Crypto	9 solves
2024/11/23	Tidal wave Crypto	5 solves

CTF HISTORY

START DATE	CTF	RANK
2025/03/01	SECCON CTF 13 決勝観戦CTF	17 / 233
2024/09/15	AlpacaHack Round 3 (Crypto)	16 / 239
2024/08/18	AlpacaHack Round 1 (Pwn)	58 / 174

WRITEUPS

WRITEUP	CREATED AT
SECCON CTF 13 writeup stream - YouTube ja official dual_summon	last year
Writeup for str.vs.cstr ja str.vs.cstr	last year

SOLVED CHALLENGES

CHALLENGE	SOLVES	SOLVED AT
pyjs Misc Daily AlpacaHack	80 solves	23 hours ago
Rock Paper Scissors Lizard Spock Web Daily AlpacaHack	92 solves	yesterday
One Byte Padding Oracle Attack Crypto Daily AlpacaHack	73 solves	yesterday
Alpaca Rangers Web Daily AlpacaHack	143 solves	yesterday
hit-and-hit Misc Daily AlpacaHack	84 solves	yesterday
Alpaca Quest Rev Daily AlpacaHack	112 solves	yesterday
Noob programmer Pwn Daily AlpacaHack	103 solves	yesterday
CopperCopperCopper Crypto Daily AlpacaHack	89 solves	yesterday
Dancing Cursor Rev Misc Daily AlpacaHack	105 solves	yesterday
Pickle Loader Misc Daily AlpacaHack	112 solves	yesterday
Disappeared Pwn Daily AlpacaHack	112 solves	yesterday
wages of sin() Rev Misc Daily AlpacaHack	89 solves	yesterday
Alpaillier Crypto Daily AlpacaHack	115 solves	yesterday
You are being redirected Web Daily AlpacaHack	112 solves	yesterday
simple ROP Pwn Daily AlpacaHack	108 solves	yesterday
nc magic Misc Daily AlpacaHack	129 solves	yesterday
AAAAAAAAEEEEEEEESSSSSSSS Crypto Daily AlpacaHack	117 solves	yesterday
destructuring Misc Daily AlpacaHack	140 solves	yesterday
Alpaca-Llama Ranch Pwn Daily AlpacaHack	119 solves	yesterday
Plz Login Web Daily AlpacaHack	217 solves	yesterday
Compressor Misc Daily AlpacaHack	106 solves	yesterday
misdirection Rev Daily AlpacaHack	154 solves	yesterday
The World Misc Daily AlpacaHack	182 solves	yesterday
RRe_Time_Limiter Crypto Daily AlpacaHack	173 solves	yesterday
Magic Engine Web Daily AlpacaHack	257 solves	yesterday
read-a-binary Rev Daily AlpacaHack	216 solves	yesterday
Substance Crypto Daily AlpacaHack	235 solves	yesterday
optimal-sort Misc Daily AlpacaHack	100 solves	last week
Linear Coffee Generator Crypto Daily AlpacaHack	110 solves	last week
shellcode-101 Pwn Daily AlpacaHack	130 solves	last week
No JS Web Daily AlpacaHack	130 solves	last week
ToyPQC Crypto Daily AlpacaHack	105 solves	last week
git gc Misc Daily AlpacaHack	149 solves	last week
Stateless Auth Web Daily AlpacaHack	165 solves	last week
Paca Paca Authenticator Crypto Daily AlpacaHack	125 solves	last week
Bashrunner Misc Daily AlpacaHack	119 solves	last week
Animal Viewer Web Daily AlpacaHack	152 solves	last week
dockerstack Misc Daily AlpacaHack	177 solves	last week
system-v Rev Daily AlpacaHack	118 solves	last week
ChaChaCha Crypto Daily AlpacaHack	155 solves	last week
dice roll Web Daily AlpacaHack	199 solves	last week
Base Length Misc Daily AlpacaHack	152 solves	last week
Short Writer Pwn Daily AlpacaHack	123 solves	last week
Five Alpacas Crypto Daily AlpacaHack	191 solves	last week
free-comment Misc Daily AlpacaHack	148 solves	last week
I wanna be the Admin Web Daily AlpacaHack	278 solves	last week
Basic Buffer Overflow Pwn Daily AlpacaHack	180 solves	last week
crazython Rev Daily AlpacaHack	179 solves	last week
RSA2026 Crypto Daily AlpacaHack	201 solves	last week
SwapSwap Misc Daily AlpacaHack	276 solves	last week
secret-table Web Daily AlpacaHack	263 solves	last week
Square RSA Crypto Daily AlpacaHack	228 solves	last week
jailiaj Misc Daily AlpacaHack	272 solves	last week
Encoding Basics Misc Crypto Daily AlpacaHack	307 solves	last week
Fushigi Crawler Web Daily AlpacaHack	332 solves	last week
Ruby Flag Checker Rev Daily AlpacaHack	279 solves	last week
super-tomato Crypto Daily AlpacaHack	378 solves	last week
108 Misc Daily AlpacaHack	286 solves	last week
one-p-rsa Crypto Daily AlpacaHack	223 solves	last week
cha-ll-enge Rev Daily AlpacaHack	151 solves	last week
simpleoverwrite Pwn Daily AlpacaHack	188 solves	last week
Useful Machine Rev Daily AlpacaHack	155 solves	last week
Xmas Login Web Daily AlpacaHack	337 solves	last week
cat3 Misc Daily AlpacaHack	214 solves	last week
Rotten Beef Pwn Daily AlpacaHack	200 solves	last week
Log Viewer Web Daily AlpacaHack	221 solves	last week
RSA debug? Crypto Daily AlpacaHack	187 solves	last week
omikuji Web Daily AlpacaHack	242 solves	last week
alloc-101 Pwn Daily AlpacaHack	214 solves	last week
Twilight Rev Daily AlpacaHack	225 solves	last week
login-bonus Pwn Daily AlpacaHack	248 solves	last week
🐈 Web Daily AlpacaHack	302 solves	last week
Flag Printer 2100 Rev Daily AlpacaHack	242 solves	last week
power_obfus_royalty Rev Daily AlpacaHack	203 solves	last week
Safe Prime Crypto Daily AlpacaHack	249 solves	last week
Sugoi Flag Checker Rev Daily AlpacaHack	198 solves	last week
Alpaca Bank Web Daily AlpacaHack	323 solves	last week
Read Assembly Rev Daily AlpacaHack	305 solves	last week
hit-and-miss Misc Daily AlpacaHack	375 solves	last week
Fully Padded RSA Crypto Daily AlpacaHack	233 solves	last week
size limit Crypto Daily AlpacaHack	310 solves	last week
simpleoverflow Pwn Daily AlpacaHack	491 solves	last week
Integer Writer Pwn Daily AlpacaHack	317 solves	last week
Leaked Flag Checker Rev Daily AlpacaHack	548 solves	last week
Emojify Web Daily AlpacaHack	581 solves	last week
a fact of CTF Crypto Daily AlpacaHack	865 solves	last week
AlpacaHack 2100 Misc Daily AlpacaHack	1574 solves	last week
Faulty AES Crypto tkbctf5	62 solves	2 weeks ago
Single Hint RSA Crypto tkbctf5	118 solves	2 weeks ago
Welcome Misc	1528 solves	2 weeks ago
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)	252 solves	last year
CakeGEAR Web CakeCTF 2022	81 solves	last year
str.vs.cstr Pwn CakeCTF 2022	27 solves	last year

Only archived challenges are displayed here.