NUMBER OF ACTIVE MEMBERS:

9892

MysteryTwister C3 - Partners

Follow us:

Level III Challenges (61)

Page 1 of the challenges in Level III, ordered by date posted (the most recent appear first).

Substitution Cipher with Non-Prefix Codes

[muralidhar-01] - 1 user already solved this challenge, 3 are working on it.

Usually prefix-free codes are used for encryption because it makes the decryption process easier at the receiver's end. However, this challenge deals with a substitution cipher with non-prefix codes. This should be broken by performing a "ciphertext-only attack".

Read more...

Click here to get to the corresponding forum topic to share your opinion.

Click here to download the challenge.

Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.

Published on: 2011-06-15 11:00

Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank	User (#1)	Achieved points (Global score)	y-m-d - h:m:s

	Peter Mustermann (Gummiboot)	13959 (60285)	2013-01-14 07:53:12

You must be logged in to solve the challenge

Pages [1]

1

Show All

powered by the CrypTool project

© 2009 - 2019 MTC3 Team

+++ [18:58 - 13.10.2019] Sph1003 solved the Level I challenge 'Number Sequence' +++ [11:22 - 13.10.2019] Lemmynator solved the Level I challenge 'Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1' +++ [10:29 - 13.10.2019] gerdw solved the Level II challenge 'Lunchtime Attack on the Fully Homomorphic Encryption Scheme' +++ [08:31 - 13.10.2019] SirAbacus solved the Level I challenge 'Number Sequence — Part 2' +++ [23:14 - 12.10.2019] Tom solved the Level I challenge 'A hidden word' +++