@tchen - AlpacaHack

tchen

@tepelchen501

AUTHORED CHALLENGES

OPEN DATE	CHALLENGE	SOLVES
2026/02/26	Rock Paper Scissors Lizard Spock Web	83 solves
2026/02/24	Alpaca Rangers Web	127 solves
2026/02/14	You are being redirected Web	107 solves
2026/02/08	Plz Login Web	194 solves
2026/02/03	Magic Engine Web	226 solves
2026/01/27	No JS Web	122 solves
2026/01/24	Stateless Auth Web	155 solves
2026/01/12	I wanna be the Admin Web	249 solves
2025/12/25	Useful Machine Rev	149 solves
2025/12/21	Log Viewer Web	211 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
Writeup for pyjs en pyjs	2 days ago
Writeup for Plz Login en Plz Login	2 weeks ago
Writeup for Magic Engine en Magic Engine	2 weeks ago
Writeup for Inu Profile en Inu Profile	3 weeks ago
Author's Writeup for No JS en official No JS	last month
Author's Writeup for Stateless Auth en official Stateless Auth	last month
Author's Writeup for Useful Machine en official Useful Machine	last month
Author's Writeup for I wanna be the Admin en official I wanna be the Admin	last month
Author's Writeup for Log Viewer en official Log Viewer	2 months ago
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
pyjs Misc Daily AlpacaHack	75 solves	2 days ago
Inu Profile Web Daily AlpacaHack B-SIDE	85 solves	last month
ChaChaCha Crypto Daily AlpacaHack	149 solves	last month
Short Writer Pwn Daily AlpacaHack	115 solves	last month
RSA2026 Crypto Daily AlpacaHack	192 solves	last month
Square RSA Crypto Daily AlpacaHack	215 solves	last month
super-tomato Crypto Daily AlpacaHack	344 solves	2 months ago
Tiny Note Web AlpacaHack Round 11 (Web)	12 solves	9 months ago
Jackpot Web AlpacaHack Round 11 (Web)	159 solves	9 months ago
Kangaroo Pwn AlpacaHack Round 10 (Pwn)	66 solves	11 months ago
Oyster Pwn AlpacaHack Round 10 (Pwn)	125 solves	11 months ago
hidden Rev AlpacaHack Round 8 (Rev)	71 solves	last year
masking tape Rev AlpacaHack Round 8 (Rev)	173 solves	last year
echo Pwn AlpacaHack Round 1 (Pwn)	345 solves	last year
Alpaca Poll Web AlpacaHack Round 7 (Web)	128 solves	last year
Treasure Hunt Web AlpacaHack Round 7 (Web)	266 solves	last year
inbound Pwn AlpacaHack Round 6 (Pwn)	204 solves	last year
GitFile Explorer Web zer0pts CTF 2022	47 solves	last year
XorshiftStream Crypto AlpacaHack Round 5 (Crypto)	62 solves	last year
Simple Flag Checker Rev AlpacaHack Round 4 (Rev)	125 solves	last year
pytecode Rev AlpacaHack Round 4 (Rev)	26 solves	last year
Panda Memo Web CakeCTF 2022	3 solves	last year
Pico Note 2 Web AlpacaHack Round 2 (Web)	8 solves	last year
Pico Note 1 Web AlpacaHack Round 2 (Web)	80 solves	last year
Simple Login Web AlpacaHack Round 2 (Web)	586 solves	last year
CaaS Web AlpacaHack Round 2 (Web)	92 solves	last year
read-write Pwn RTACTF 2023 Spring	41 solves	last year
write Pwn RTACTF 2023 Spring	85 solves	last year
Reused-AES Crypto RTACTF 2023 Spring	33 solves	last year
XOR-CBC Crypto RTACTF 2023 Spring	76 solves	last year
before-write Pwn RTACTF 2023 Spring	160 solves	last year
Welcome Misc	1454 solves	last year
Neko Note Web zer0pts CTF 2023	9 solves	last year
OpenBio 2 Web CakeCTF 2023	7 solves	last year
readme 2022 Misc CakeCTF 2022	14 solves	last year
OpenBio Web CakeCTF 2022	21 solves	last year
jqi Web zer0pts CTF 2023	14 solves	last year
Warmuprofile Web zer0pts CTF 2023	27 solves	last year
AdBlog Web CakeCTF 2023	11 solves	last year
CakeGEAR Web CakeCTF 2022	79 solves	last year
TOWFL Web Cheat CakeCTF 2023	50 solves	last year
Country DB Web CakeCTF 2023	220 solves	last year

Only archived challenges are displayed here.