@ptr-yudai - AlpacaHack

ptr-yudai

@ptrYudai

AUTHORED CHALLENGES

OPEN DATE	CHALLENGE	SOLVES
2025/12/16	login-bonus Pwn	219 solves
2025/12/12	Safe Prime Crypto	228 solves
2025/03/23	Oyster Pwn	122 solves
2025/03/23	giraffe.ko Pwn	20 solves
2025/03/23	Takahashi Pwn	26 solves
2025/03/23	Kangaroo Pwn	64 solves
2024/11/23	Paragraph Pwn	3 solves
2024/11/23	TOY/2 Pwn	2 solves
2024/11/23	packed Rev	13 solves
2024/11/23	F is for Flag Rev	2 solves
2024/11/23	Reaction Rev	0 solves
2024/11/03	wall Pwn	58 solves
2024/11/03	catcpy Pwn	141 solves
2024/11/03	ideabook Pwn	36 solves
2024/11/03	inbound Pwn	202 solves
2024/10/05	I2C Device Rev	10 solves
2024/08/18	todo Pwn	23 solves
2024/08/18	deck Pwn	42 solves
2024/08/18	echo Pwn	335 solves
2024/08/18	hexecho Pwn	111 solves
2023/11/11	bofww Pwn	37 solves
2023/11/11	bofwow Pwn	12 solves
2023/11/11	imgchk Rev	8 solves
2023/11/11	Gaming VM Rev	8 solves
2023/11/11	unicomp Sandbox	1 solve
2023/11/11	Word Tower Cheat	2 solves
2023/11/11	Memorial Cabbage Pwn	19 solves
2023/11/11	decryptyou Pwn Crypto	4 solves
2023/11/11	Country DB Web	220 solves
2023/11/11	cranelift Sandbox	2 solves
2023/11/11	TOWFL Web Cheat	48 solves
2023/11/11	OpenBio 2 Web	6 solves
2023/11/11	AdBlog Web	11 solves
2023/11/11	nande Rev	15 solves
2023/11/11	vtable4b Pwn	60 solves
2023/07/15	WISE Pwn	0 solves
2023/07/15	aush Pwn	21 solves
2023/07/15	decompile me Rev	48 solves
2023/07/15	topology Rev	6 solves
2023/07/15	qjail Pwn	5 solves
2023/07/15	fvm Rev	7 solves
2023/07/15	mimikyu Rev	14 solves
2023/07/15	sharr Pwn	0 solves
2023/07/15	Himitsu Note Pwn	3 solves
2023/07/15	NetFS 1 Misc	12 solves
2023/07/15	NetFS 2 Misc	3 solves
2023/07/15	SquareRNG Crypto	14 solves
2023/07/15	ScoreShare Web	1 solve
2023/07/15	BrainJIT Pwn	6 solves
2023/03/21	1R-AES Crypto	17 solves
2023/03/21	write Pwn	84 solves
2023/03/21	read-write Pwn	40 solves
2023/03/21	XOR-CBC Crypto	76 solves
2023/03/21	Reused-AES Crypto	32 solves
2023/03/21	before-write Pwn	158 solves
2023/03/21	Collision-DES Crypto	37 solves
2023/03/21	only-read Pwn	21 solves
2022/09/03	kiwi Rev	9 solves
2022/09/03	OpenBio Web	19 solves
2022/09/03	smal arey Pwn	17 solves
2022/09/03	matsushima3 Cheat	1 solve
2022/09/03	ImageSurfing Misc Web	5 solves
2022/09/03	CakeGEAR Web	77 solves
2022/09/03	C-Sandbox Misc	4 solves
2022/09/03	luau Rev	33 solves
2022/09/03	readme 2022 Misc	13 solves
2022/09/03	Cake Memory Cheat	2 solves
2022/09/03	str.vs.cstr Pwn	26 solves
2022/09/03	crc32pwn Pwn	0 solves
2022/09/03	welkerme Pwn	25 solves
2022/09/03	Panda Memo Web	3 solves
2022/09/03	zundamon Rev Forensics	7 solves
2022/09/03	nimrev Rev	78 solves
2022/03/19	GitFile Explorer Web	45 solves
2022/03/19	q-solved Quantum Rev	1 solve
2022/03/19	sbxnote Pwn	2 solves
2022/03/19	service Rev	8 solves
2022/03/19	accountant Pwn	6 solves
2022/03/19	MathHash Misc	2 solves
2022/03/19	dreamland Rev	3 solves
2022/03/19	kRCE Pwn	4 solves
2022/03/19	miniblog++ Web	9 solves
2022/03/19	Anti-Fermat Crypto	29 solves
2022/03/19	miniblog# Web	0 solves
2022/03/19	redis-lite Pwn	0 solves
2022/03/19	Zer0TP Misc Web	0 solves
2022/03/19	MemSafeD Pwn	3 solves
2022/03/19	kvstore Pwn	2 solves
2022/03/19	0AV Misc	0 solves

CTF HISTORY

START DATE	CTF	RANK
2025/03/23	AlpacaHack Round 10 (Pwn)	43 / 95
2025/03/01	SECCON CTF 13 決勝観戦CTF	94 / 233
2024/12/30	AlpacaHack Round 8 (Rev)	7 / 316
2024/11/30	AlpacaHack Round 7 (Web)	79 / 458
2024/09/01	AlpacaHack Round 2 (Web)	11 / 300
2024/08/18	AlpacaHack Round 1 (Pwn)	58 / 174

WRITEUPS

WRITEUP	CREATED AT
login-bonus (Daily AlpacaHack 2025/12/17) 公式Writeup - CTFするぞ ja official login-bonus	last month
AlpacaHack Round 6 (Pwn)のWriteup - CTFするぞ ja official AlpacaHack Round 6 (Pwn)	last year
AlpacaHack Round 1 (Pwn)のWriteup - CTFするぞ ja official AlpacaHack Round 1 (Pwn)	last year

SOLVED CHALLENGES

CHALLENGE	SOLVES	SOLVED AT
masking tape Rev AlpacaHack Round 8 (Rev)	170 solves	last year
hidden Rev AlpacaHack Round 8 (Rev)	71 solves	last year
subway Rev AlpacaHack Round 8 (Rev)	15 solves	last year
CaaS Web AlpacaHack Round 2 (Web)	90 solves	last year
Simple Login Web AlpacaHack Round 2 (Web)	560 solves	last year

Only archived challenges are displayed here.