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Challenges

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Rows:

CHALLENGEAUTHORS

SOLVES

(CURRENT)

SOLVE RATE

(AT CONTEST TIME)

AlpacaHack 2100

Daily AlpacaHack

admin

1736

solves

-

1563

solves

-

Daily AlpacaHack

922

solves

-

AlpacaHack Round 2 (Web)

622

solves

Top 28%

= 84/300 users

Daily AlpacaHack

616

solves

-

Daily AlpacaHack

599

solves

-

SECCON Beginners CTF 2024

537

solves

Top 73%

= 683/928 teams

Daily AlpacaHack

407

solves

-

Daily AlpacaHack

401

solves

-

Daily AlpacaHack

369

solves

-

Daily AlpacaHack

365

solves

-

echo

AlpacaHack Round 1 (Pwn)

362

solves

Top 32%

= 56/174 users

Daily AlpacaHack

348

solves

-

Daily AlpacaHack

339

solves

-

Daily AlpacaHack

335

solves

-

Daily AlpacaHack

328

solves

-

Encoding Basics

Daily AlpacaHack

327

solves

-

🐈

Daily AlpacaHack

321

solves

-

Bars

Daily AlpacaHack

317

solves

-

108

Daily AlpacaHack

303

solves

-

Rows:

trippple

SECCON CTF 13 決勝観戦CTF
105 solves
Crypto

Author:

minaminao

minaminao

出力からフラグを復元してください🐍

import os
from Crypto.Util.number import getPrime, bytes_to_long

m = bytes_to_long(os.getenv("FLAG").encode())
p = getPrime(96)
n = p * p * p
e = 65537
c = pow(m, e, n)

print(f"{n,c=}")

出力:

n,c=(272361880253535445317143279209232620259509770172080133049487958853930525983846305005657, 69147423377323669983172806367084358432369489877851180970277804462365354019444586165184)
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