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Daily AlpacaHack

A daily CTF challenge with a fun new puzzle every day

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We publish one simple, beginner-friendly or educational CTF challenge every day!

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Today's Challenge
pppp4649pppp4649
Elliptic Equation
Crypto
Hard
17 solves
Submissions (latest 3)
tadanobutubutu
tadanobutubutu

SOLVED!

Jun 12, 5:57 PM

panya

SOLVED!

Jun 12, 5:41 PM

kurgm

SOLVED!

Jun 12, 5:34 PM

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Writeups

tadanobutubutu

Writeup for Floating Equality

tadanobutubutu

ja
Floating Equality

1 hour ago

nirvana

Writeup for Alpaca Certification

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Writeup for chmod-swapper

ja

2026/06/11 01:15

Daily AlpacaHackに挑戦するつくよみちゃん 06/06/Flag for localhost/nozokare

Daily AlpacaHackに挑戦するつくよみちゃん 06/10/chmod-swapper/shiragi

ja

2026/06/10 19:06

tadanobutubutu

Writeup for A Piece of DHKE

Daily AlpacaHackに挑戦するつくよみちゃん 06/09/A Piece of DHKE/nozokare

Rows:

Elliptic Equation

Topic: Elliptic CurveReleased: Jun 13, 2026

17 solves
Crypto
Hard

by

pppp4649

pppp4649

After playing with ordinary equations, I moved on to elliptic curve equations.

Hint for beginners
  • The goal is to find secret such that Q = secret * G.
  • This kind of problem is called the discrete logarithm problem on an elliptic curve.
  • SageMath has functions for computing discrete logarithms.
elliptic-equation.tar.gz

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