AlpacaHack Logo

Tag: Flag Checker

Sign InSign Up
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

read-a-binary

Daily AlpacaHackTopic: ELFReleased: Feb 3, 2026

253 solves
Rev

by

tan90909090

tan90909090

USER

SOLVED AT

ly4

2026/06/09 15:51

2026/06/06 17:12

2026/06/06 09:08

2026/06/01 12:04

2026/06/01 05:22

2026/05/27 22:43

2026/05/27 03:11

2026/05/26 03:35

2026/05/24 13:51

2026/05/20 01:15

2026/05/16 02:45

2026/05/14 08:52

2026/05/12 20:21

2026/05/11 10:21

2026/05/09 02:53

2026/05/08 11:52

2026/05/08 11:44

2026/04/29 14:40

2026/04/29 12:46

2026/04/24 04:40

2026/04/24 03:05

2026/04/21 04:48

2026/04/16 21:49

2026/04/16 12:04

2026/04/15 08:04

Rows:

descriptionsolveswriteups