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ark

@arkark_

AUTHORED CHALLENGES

OPEN DATECHALLENGESOLVES

2026/01/13

free-comment
Misc
109 solves

2026/01/07

secret-table
Web
189 solves

2025/12/15

🐈
Web
243 solves

2025/12/08

hit-and-miss
Misc
278 solves

2025/12/02

Emojify
Web
437 solves

2025/05/17

Jackpot
Web
149 solves

2025/05/17

Redirector
Web
28 solves

2025/05/17

Tiny Note
Web
12 solves

2025/05/17

AlpacaMark
Web
14 solves

2025/05/17

AlpacaMark Revenge
Web
4 solves

2024/11/30

disconnection-revenge
Web
8 solves

2024/11/30

Treasure Hunt
Web
257 solves

2024/11/30

minimal-waf
Web
23 solves

2024/11/30

disconnection
Web
21 solves

2024/11/23

pp4
Jail
3 solves

2024/11/23

voidbox
Jail
0 solves

2024/11/23

1linepyjail
Jail
4 solves

2024/11/23

Go to Jail
Jail
0 solves

2024/11/23

Trillion Bank
Web
11 solves

2024/11/23

double-parser
Web
2 solves

2024/11/23

self-ssrf
Web
5 solves

2024/09/01

Pico Note 1
Web
75 solves

2024/09/01

Pico Note 2
Web
8 solves

2024/09/01

Simple Login
Web
543 solves

2024/09/01

CaaS
Web
90 solves

CTF HISTORY

START DATECTFRANK

2025/05/17

AlpacaHack Round 11 (Web)
65 / 213

2025/03/01

SECCON CTF 13 決勝観戦CTF
171 / 233

2024/11/30

AlpacaHack Round 7 (Web)
79 / 458

2024/09/01

AlpacaHack Round 2 (Web)
85 / 300

WRITEUPS

WRITEUPCREATED AT
AlpacaHack Round 7 (Web) - 作問者writeup | XS-Spin Blog
ja
official
AlpacaHack Round 7 (Web)

last year

AlpacaHack Round 2 (Web) - 作問者writeup | XS-Spin Blog
ja
official
AlpacaHack Round 2 (Web)

last year

SOLVED CHALLENGES

CHALLENGESOLVES

SOLVED AT

Fully Padded RSA
Crypto
Daily AlpacaHack

200 solves

last month