Hawksmouth needs your help!

An agent of Shroud gave me an encrypted message they found on an messenger of the outcasts who tried to get into Hawksmouth. They believe its content to be connected to a planned sabotage from within the walls of the city. Other sources indicate preparations being made for a frontal attack on the main gate by a nearby outcasts militia. This reinforces our assumptions about a possible thread from within, since a direct attack on our city-walls would end up being a suicide mission. Note that local security has not yet been alerted since we try to avoid outbreaks of panic which could lead to military and civilian casualties.


The decryption of this message is crucial to the cause of identifying and eliminating double agents BEFORE the attack since it is our only source of information available. The messenger took his life before he could be brought into custody for further questioning,. However a raid on his hideout by Maul's special forces brought the machine used for the en- and decryption of the message to light.


Rune's scientists were able to extract the algorithm for this task but weren't capable to revert the encryption since it needs a password that only two persons seem to know (our dead messenger and the saboteur).


In short here are our mission objectives:

1.     Decrypt the message*
   
2.     Find the password used for en- and decryption of the message
   
3.     Write a program that is able to decrypt all messages made by such device without the password
   

*top priority

encrypted-message.txt
encryption.txt