rail-fence

In this task, we need to decrypt the message message.txt, which was previously encrypted using the Rail Fence Cipher..

Ta _7N6D49hlg:W3D_H3C31N__A97ef sHR053F38N43D7B i33___N6

NOTE

Resources that may help:

• Rail Fence Cipher - Encryption and Decryption | GeekForGeeks : click
• K-Rail Fence Cipher Encryption/Decryption Algorithm | GitHub : click

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Let’s use the decryption tool I’ve found on GitHub:

git clone https://github.com/LeoMartinezTAMUK/K-Rail_Fence_Cipher_Encryption-Decryption.git

According to the condition, there were 4 “rails.”:

picoCTF{WH3R3_D035_7H3_F3NC3_8361N_4ND_3ND_4A76B997}