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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

Ruby Flag Checker

Daily AlpacaHackTopic: RubyReleased: Jan 3, 2026

351 solves
Rev

by

hiikunz

hiikunz

USER

SOLVED AT

puagg99

2026/10/10 16:50

2026/10/08 05:55

2026/10/07 15:52

2026/10/04 04:11

2026/09/29 01:00

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2026/08/31 20:16

2026/08/27 14:07

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2026/08/20 07:57

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2026/08/11 23:25

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2026/08/10 02:30

2026/08/09 07:54

2026/08/08 11:20

2026/08/05 11:28

2026/08/04 20:34

2026/08/01 23:59

2026/07/29 13:30

Rows:

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