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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

337 solves
Rev

by

hiikunz

hiikunz

USER

SOLVED AT

mikan1135

2026/08/16 05:47

haruhana

2026/08/16 03:33

yasoikawa2

2026/08/11 23:25

bullupus

2026/08/11 14:04

kurimochi

kurimochi

2026/08/10 02:30

mamonbo

2026/08/09 07:54

ghostinthefingers

2026/08/08 11:20

nojo723

2026/08/05 11:28

gb-onthe-h

2026/08/04 20:34

alpha0314sub

alpha0314sub

2026/08/01 23:59

macarthur

2026/07/29 13:30

mg7x

2026/07/29 10:38

moco

2026/07/29 04:30

a2zog

2026/07/27 15:24

sasamari-myun

2026/07/11 11:28

garangara

2026/07/11 10:27

sasa967

2026/07/09 07:39

paper

2026/07/07 00:55

ririnbaru

2026/07/01 03:01

charo

2026/06/20 07:08

mena

2026/06/16 14:43

141

2026/06/11 15:31

linemill

2026/06/06 16:56

sp1n0z4

sp1n0z4

2026/05/27 21:34

toto1010orange

2026/05/27 11:36

Rows:

descriptionsolveswriteups