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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

141 solves
Rev

by

serioton

serioton

USER

SOLVED AT

salmon

11 hours ago

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

2026/06/10 03:01

2026/06/09 05:21

2026/06/04 08:39

2026/06/03 05:27

2026/06/03 03:58

2026/05/31 04:45

2026/05/30 12:33

2026/05/30 01:44

2026/05/25 12:36

2026/05/24 09:06

2026/05/24 01:52

2026/05/22 08:13

2026/05/22 02:15

2026/05/21 00:10

2026/05/19 13:47

2026/05/18 12:16

2026/05/18 03:57

Rows:

descriptionsolveswriteups