Ulli Weichert/ April 4, 2022/ IT-Security, Write-Ups/ 0Kommentare

transposition-trial

Description

Our data got corrupted on the way here. Luckily, nothing got replaced, but every block of 3 got scrambled around! The first word seems to be three letters long, maybe you can use that to recover the rest of the message.
Download the corrupted message here.

Solving

1. Looking into the encrypted message we can see, that the first word should be The but is scrambled to heT.
2. Because of the challenge title we can look for a transposition cypher tool like this one.
3. In transposition ciphers, we don’t replace the letters by other symbols, but we simply change the order in which they appear on the cleartext.

4. Lets try to get the key... because the key is responsible for the new sorting it should be something, that will "sort" the first letter to the "third" position.

   1. Play with some keys... have in mind, that the first char is in position three.

   I chosed:

   CAB 

   And setting rows by rows.