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

Mirage

Daily AlpacaHackTopic: LFSRReleased: May 11, 2026

162 solves
Rev

by

serioton

serioton

USER

SOLVED AT

harada166

2026/09/26 07:53

2026/09/25 02:52

2026/09/16 00:50

2026/09/09 14:57

2026/09/04 23:51

2026/08/31 19:49

2026/08/30 23:49

2026/08/30 23:31

2026/08/29 06:08

2026/08/27 11:46

2026/08/27 02:59

2026/08/25 13:41

2026/08/23 03:02

2026/08/10 16:53

2026/08/08 21:32

2026/08/03 06:14

2026/07/30 05:58

2026/07/30 04:06

2026/07/30 00:57

2026/07/15 12:15

2026/07/09 12:10

2026/07/08 15:41

2026/07/07 03:17

2026/06/28 03:06

2026/06/20 18:50

Rows:

descriptionsolveswriteups