AlpacaHack Logo

Tag: Flag Checker

Sign InSign Up
Flag Checker

Flag checkers are a common type of challenge in the Reverse Engineering category.

An executable or script called a flag checker takes the player's input and outputs whether that input matches the flag.

These challenges may also be called "crackmes" in a broader sense. (automatically translated from Japanese)

minaminao
·Updated May 3, 2026
Flag Checker Challenges

Sugoi Flag Checker

Daily AlpacaHackTopic: ELFReleased: Dec 12, 2025

224 solves
Rev

by

chocorusk

chocorusk

Writeups

chocorusk

Author’s Writeup for Sugoi Flag Checker

chocorusk

author
ja

2025/12/15 10:39


neglect-yp

Writeup for Sugoi Flag Checker

ja

2025/12/13 01:36


chjwoo

Writeup for Sugoi Flag Checker

en

2025/12/14 12:34


trimscash

Daily AlpacaHack 2週間目Writeup 12/08~12/14

ja

2025/12/15 19:49



descriptionsolveswriteups