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Tag: Flag Checker

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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

158 solves
Rev

by

serioton

serioton

USER

SOLVED AT

halr

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

2026/06/15 12:36

2026/06/15 11:54

2026/06/15 02:53

2026/06/12 04:08

Rows:

descriptionsolveswriteups