Avatar

Labs / Rail Fence

  • Daily Challenge
  • Released 16 Jul 2025

Rail Fence

Start the machine, hack the system, and find the hidden flags to complete this challenge and earn points!

1
Flags
1
Points
Daily Challenge
Solution Available
Pro Exclusive
Start Lab Environment
~1-2 min setup
AWS dedicated
Private instance
Industry standard
Daily Challenge

Rail Fence - Challenge Description

Challenge Overview

A message has been encrypted using the Rail Fence cipher. Your task is to decrypt the message to reveal the hidden flag in UUID format. The Rail Fence cipher is a transposition cipher that rearranges the characters of the plaintext.

Learning Objectives

  • Learn about transposition ciphers
  • Understand Rail Fence cipher mechanics
  • Practice manual decryption techniques
  • Develop pattern recognition skills

Challenge Details

The encrypted message uses a specific number of rails in the Rail Fence cipher. You need to determine the number of rails and decrypt the message to find the flag.