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
hiikunz
tan90909090
chocorusk
arata-nvm
arata-nvm
keymoon
tan90909090
yu212
arata-nvm
ptr-yudai
soon-haari
sugi
xornet
ptr-yudai
arata-nvm
ptr-yudai
ptr-yudai
ptr-yudai
n01e0
ptr-yudai
keymoon
n01e0
ptr-yudai
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