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

Remnant

Daily AlpacaHackTopic: EncodingReleased: Nov 2, 2026

47 solves
Misc

by

2501

USER

SOLVED AT

hydraa

2 hours ago

2026/11/05 17:31

2026/11/04 23:28

2026/11/04 23:02

2026/11/04 13:32

2026/11/04 11:09

2026/11/04 07:46

2026/11/04 05:09

2026/11/04 04:18

2026/11/04 03:07

2026/11/04 02:26

2026/11/04 01:20

2026/11/03 17:46

2026/11/03 11:22

2026/11/03 10:53

2026/11/03 08:55

2026/11/03 08:26

2026/11/03 06:01

2026/11/03 04:49

2026/11/02 17:38

2026/11/02 16:21

2026/11/02 14:20

2026/11/02 12:32

2026/11/02 11:04

2026/11/02 10:35

Rows:

descriptionsolveswriteups