Challenge #14

Evil Hackers have changed the password on Santa's sleigh, so he can’t use it! Santa has asked you to help him save Christmas by recovering his password. The not entirely evil hackers did leave Santa some clues on how to solve get his password back.


1. The ciphertext of his key in binary format
2. And that they used a simple stream cipher to encrypt the password  with the initial value(IV) [1,1,1,1,1,1,1]

Can you help Santa log into his new self driving sleigh by cracking the password?

Ciphertext: 

10101000 01101101 01101011 00111100 10000101 00001010 10111000 10011111 01110101 00101110 11011101

 

 

 

 

 

Puzzle made by



Mathias Rasmussen, Senior Consultant

Mathias is a graduate from NTNU with a bachelor degree in IT-Supported Business Architecture. He is a part of Visma Consulting Norway, working as a functional architect.





Håkon Thorvaldsen, IT-Consultant

Håkon is a graduate from the University of Bergen, with a masters degree in IT and cryptography. He’s a part of Visma Consulting Norway, working as a Java developer and security consultant.




Anton Kurbatov, Lead Consultant

Anton is a graduate from the State University of Saratov, with a masters degree in applied math, and from Technical State University of Saratov, with higher diploma in software engineering. He’s a part of Visma Consulting Norway, working as a Java developer.