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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

137 solves
Rev

by

serioton

serioton

USER

SOLVED AT

ly4

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

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2026/05/21 00:10

2026/05/19 13:47

2026/05/18 12:16

2026/05/18 03:57

2026/05/16 21:51

2026/05/16 12:22

2026/05/15 06:25

2026/05/14 19:32

Rows:

descriptionsolveswriteups