@tchen - AlpacaHack

tchen

@tepelchen501

AUTHORED CHALLENGES

OPEN DATE	CHALLENGE	SOLVES
2026/01/12	I wanna be the Admin Web	188 solves
2025/12/25	Useful Machine Rev	142 solves
2025/12/21	Log Viewer Web	192 solves

CTF HISTORY

START DATE	CTF	RANK
2025/05/17	AlpacaHack Round 11 (Web)	4 / 213
2025/03/23	AlpacaHack Round 10 (Pwn)	19 / 95
2025/03/01	SECCON CTF 13 決勝観戦CTF	11 / 233
2024/12/30	AlpacaHack Round 8 (Rev)	15 / 316
2024/11/30	AlpacaHack Round 7 (Web)	33 / 458
2024/11/03	AlpacaHack Round 6 (Pwn)	45 / 197
2024/10/12	AlpacaHack Round 5 (Crypto)	28 / 247
2024/09/15	AlpacaHack Round 3 (Crypto)	92 / 239
2024/08/18	AlpacaHack Round 1 (Pwn)	58 / 174

WRITEUPS

WRITEUP	CREATED AT
Author's Writeup for Useful Machine en official Useful Machine	last week
Author's Writeup for I wanna be the Admin en official I wanna be the Admin	last week
Author's Writeup for Log Viewer en official Log Viewer	last month
Writeup for AlpacaHack Round 7 (Web) en AlpacaHack Round 7 (Web)	last year
Writeup for pytecode ja pytecode	last year

SOLVED CHALLENGES

CHALLENGE	SOLVES	SOLVED AT
ChaChaCha Crypto Daily AlpacaHack	128 solves	4 days ago
Short Writer Pwn Daily AlpacaHack	95 solves	6 days ago
RSA2026 Crypto Daily AlpacaHack	172 solves	last week
Square RSA Crypto Daily AlpacaHack	186 solves	2 weeks ago
super-tomato Crypto Daily AlpacaHack	274 solves	3 weeks ago
Tiny Note Web AlpacaHack Round 11 (Web)	12 solves	8 months ago
Jackpot Web AlpacaHack Round 11 (Web)	152 solves	8 months ago
Kangaroo Pwn AlpacaHack Round 10 (Pwn)	63 solves	10 months ago
Oyster Pwn AlpacaHack Round 10 (Pwn)	120 solves	10 months ago
hidden Rev AlpacaHack Round 8 (Rev)	71 solves	last year
masking tape Rev AlpacaHack Round 8 (Rev)	169 solves	last year
echo Pwn AlpacaHack Round 1 (Pwn)	330 solves	last year
Alpaca Poll Web AlpacaHack Round 7 (Web)	125 solves	last year
Treasure Hunt Web AlpacaHack Round 7 (Web)	261 solves	last year
inbound Pwn AlpacaHack Round 6 (Pwn)	201 solves	last year
GitFile Explorer Web zer0pts CTF 2022	45 solves	last year
XorshiftStream Crypto AlpacaHack Round 5 (Crypto)	60 solves	last year
Simple Flag Checker Rev AlpacaHack Round 4 (Rev)	124 solves	last year
pytecode Rev AlpacaHack Round 4 (Rev)	25 solves	last year
Panda Memo Web CakeCTF 2022	2 solves	last year
Pico Note 2 Web AlpacaHack Round 2 (Web)	8 solves	last year
Pico Note 1 Web AlpacaHack Round 2 (Web)	75 solves	last year
Simple Login Web AlpacaHack Round 2 (Web)	548 solves	last year
CaaS Web AlpacaHack Round 2 (Web)	90 solves	last year
read-write Pwn RTACTF 2023 Spring	40 solves	last year
write Pwn RTACTF 2023 Spring	84 solves	last year
Reused-AES Crypto RTACTF 2023 Spring	31 solves	last year
XOR-CBC Crypto RTACTF 2023 Spring	76 solves	last year
before-write Pwn RTACTF 2023 Spring	157 solves	last year
Welcome Misc	1369 solves	last year
Neko Note Web zer0pts CTF 2023	9 solves	last year
OpenBio 2 Web CakeCTF 2023	6 solves	last year
readme 2022 Misc CakeCTF 2022	13 solves	last year
OpenBio Web CakeCTF 2022	19 solves	last year
jqi Web zer0pts CTF 2023	12 solves	last year
Warmuprofile Web zer0pts CTF 2023	24 solves	last year
AdBlog Web CakeCTF 2023	10 solves	last year
CakeGEAR Web CakeCTF 2022	77 solves	last year
TOWFL Web Cheat CakeCTF 2023	48 solves	last year
Country DB Web CakeCTF 2023	218 solves	last year

Only archived challenges are displayed here.