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@chocorusk

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chocorusk

@nuo_chocorusk

AUTHORED CHALLENGES

OPEN DATECHALLENGESOLVES

2025/12/11

Sugoi Flag Checker
Rev
164 solves

2025/01/26

RSAMPC
Crypto
32 solves

2025/01/26

addprimes
Crypto
25 solves

2025/01/26

Equivalent Privacy Wired
Crypto
7 solves

2024/10/12

Broadcasting NTRU
Crypto
9 solves

CTF HISTORY

START DATECTFRANK

2025/07/20

AlpacaHack Round 13 (Crypto)
1 / 62

2025/07/06

AlpacaHack Round 12 (Crypto)
2 / 78

2025/01/26

AlpacaHack Round 9 (Crypto)
20 / 138

2024/11/30

AlpacaHack Round 7 (Web)
22 / 458

2024/11/03

AlpacaHack Round 6 (Pwn)
58 / 197

2024/10/12

AlpacaHack Round 5 (Crypto)
32 / 247

2024/10/05

AlpacaHack Round 4 (Rev)
38 / 279

2024/09/15

AlpacaHack Round 3 (Crypto)
3 / 239

2024/09/01

AlpacaHack Round 2 (Web)
58 / 300

WRITEUPS

WRITEUPCREATED AT
Author’s Writeup for Sugoi Flag Checker
ja
official
Sugoi Flag Checker

2 weeks ago

Writeup for SECCON CTF 13 Quals
ja
reiwa_rot13

10 months ago

AlpacaHack Round 9 (Crypto) 作問者writeup
ja
official
AlpacaHack Round 9 (Crypto)

11 months ago

Broadcasting NTRU 作問者writeup
ja
official
Broadcasting NTRU

last year

Writeup for AlpacaHack Round 3 (Crypto)
ja
AlpacaHack Round 3 (Crypto)

last year

SOLVED CHALLENGES

CHALLENGESOLVES

SOLVED AT

super-tomato
Crypto
Daily AlpacaHack

172 solves

yesterday

RBG
Crypto
Daily AlpacaHack

97 solves

2 days ago

108
Misc
Daily AlpacaHack

169 solves

3 days ago

one-p-rsa
Crypto
Daily AlpacaHack

146 solves

5 days ago

cha-ll-enge
Rev
Daily AlpacaHack

116 solves

6 days ago

simpleoverwrite
Pwn
Daily AlpacaHack

128 solves

last week

Useful Machine
Rev
Daily AlpacaHack

123 solves

last week

Xmas Login
Web
Daily AlpacaHack

202 solves

last week

cat3
Misc
Daily AlpacaHack

172 solves

last week

Rotten Beef
Pwn
Daily AlpacaHack

152 solves

last week

Log Viewer
Web
Daily AlpacaHack

171 solves

last week

RSA debug?
Crypto
Daily AlpacaHack

151 solves

last week

omikuji
Web
Daily AlpacaHack

181 solves

2 weeks ago

alloc-101
Pwn
Daily AlpacaHack

173 solves

2 weeks ago

Twilight
Rev
Daily AlpacaHack

182 solves

2 weeks ago

login-bonus
Pwn
Daily AlpacaHack

195 solves

2 weeks ago

🐈
Web
Daily AlpacaHack

224 solves

2 weeks ago

Flag Printer 2100
Rev
Daily AlpacaHack

184 solves

2 weeks ago

power_obfus_royalty
Rev
Daily AlpacaHack

164 solves

2 weeks ago

Safe Prime
Crypto
Daily AlpacaHack

207 solves

3 weeks ago

Sugoi Flag Checker
Rev
Daily AlpacaHack

164 solves

3 weeks ago

Alpaca Bank
Web
Daily AlpacaHack

234 solves

3 weeks ago

Read Assembly
Rev
Daily AlpacaHack

233 solves

3 weeks ago

hit-and-miss
Misc
Daily AlpacaHack

265 solves

3 weeks ago

Fully Padded RSA
Crypto
Daily AlpacaHack

189 solves

3 weeks ago

Integer Writer
Pwn
Daily AlpacaHack

233 solves

3 weeks ago

size limit
Crypto
Daily AlpacaHack

233 solves

3 weeks ago

Leaked Flag Checker
Rev
Daily AlpacaHack

373 solves

4 weeks ago

a fact of CTF
Crypto
Daily AlpacaHack

562 solves

4 weeks ago

Emojify
Web
Daily AlpacaHack

402 solves

4 weeks ago

AlpacaHack 2100
Misc
Daily AlpacaHack

848 solves

4 weeks ago

simpleoverflow
Pwn
Daily AlpacaHack

339 solves

4 weeks ago

MissingNo.2
Crypto
AlpacaHack Round 13 (Crypto)

6 solves

5 months ago

MissingNo.1
Crypto
AlpacaHack Round 13 (Crypto)

9 solves

5 months ago

Polynomial Puzzle
Crypto
AlpacaHack Round 13 (Crypto)

4 solves

5 months ago

Jerr0-day
Crypto
AlpacaHack Round 13 (Crypto)

10 solves

5 months ago

Jerry's flag checker
Crypto
AlpacaHack Round 13 (Crypto)

28 solves

5 months ago

Zero-sum game
Crypto
AlpacaHack Round 12 (Crypto)

3 solves

6 months ago

Flag Sharing
Crypto
AlpacaHack Round 12 (Crypto)

9 solves

6 months ago

OTEC
Crypto
AlpacaHack Round 12 (Crypto)

38 solves

6 months ago

RSARSARSARSARSARSA
Crypto
AlpacaHack Round 12 (Crypto)

71 solves

6 months ago

Trillion Ether
Blockchain
SECCON CTF 13 Quals

5 solves

10 months ago

Tidal wave
Crypto
SECCON CTF 13 Quals

2 solves

10 months ago

dual_summon
Crypto
SECCON CTF 13 Quals

6 solves

10 months ago

reiwa_rot13
Crypto
SECCON CTF 13 Quals

23 solves

10 months ago

addprimes
Crypto
AlpacaHack Round 9 (Crypto)

25 solves

11 months ago

Equivalent Privacy Wired
Crypto
AlpacaHack Round 9 (Crypto)

7 solves

11 months ago

RSAMPC
Crypto
AlpacaHack Round 9 (Crypto)

32 solves

11 months ago

ffmac
Crypto
AlpacaHack Round 9 (Crypto)

8 solves

11 months ago

Alpaca Poll
Web
AlpacaHack Round 7 (Web)

122 solves

last year

Treasure Hunt
Web
AlpacaHack Round 7 (Web)

253 solves

last year

SchnorrLCG
Crypto
AlpacaHack Round 5 (Crypto)

20 solves

last year

NNNN
Crypto
AlpacaHack Round 5 (Crypto)

44 solves

last year

XorshiftStream
Crypto
AlpacaHack Round 5 (Crypto)

59 solves

last year

Broadcasting NTRU
Crypto
AlpacaHack Round 5 (Crypto)

9 solves

last year

Simple Flag Checker
Rev
AlpacaHack Round 4 (Rev)

121 solves

last year

Hat Trick
Crypto
AlpacaHack Round 3 (Crypto)

60 solves

last year

A Dance of Add and Mul
Crypto
AlpacaHack Round 3 (Crypto)

69 solves

last year

Rainbow Sweet Alchemist
Crypto
AlpacaHack Round 3 (Crypto)

116 solves

last year

qrime
Crypto
AlpacaHack Round 3 (Crypto)

239 solves

last year

echo
Pwn
AlpacaHack Round 1 (Pwn)

318 solves

last year

Pico Note 1
Web
AlpacaHack Round 2 (Web)

73 solves

last year

CaaS
Web
AlpacaHack Round 2 (Web)

88 solves

last year

Simple Login
Web
AlpacaHack Round 2 (Web)

527 solves

last year

Welcome
Misc

1314 solves

last year