[Cryptography] Steganography and bringing encryption to a piece of paper

[Bill Cox]

This is cool but I do not think this algorithm is very secure. For example
I encrypted "this is a test" followed by "this is a test" and the
ciphertext included for ciphertext words repeated. I have not read the
paper but it sounds like the algorithm needs a bit of work. Sorry about not
the reading the paper but I am on vacation and I do not have a reader
On Jul 16, 2014 7:30 PM, "Grégory Alvarez" <gregory at alvarez-garcia.com>
wrote:

> Hello,
>
> last year I designed a new encryption algorithm (
> http://eprint.iacr.org/2013/551.pdf) based on transposition rather than
> substitution. The idea behind this algorithm is like cutting every letter
> of a whole book and shuffling them together. The result is so big and mixed
> up that it is possible to recreate a completely different book from it. The
> algorithm generates from a password a relation between two sets,
> associating uniquely each element in one set to the other one.
>
> The proprieties of this algorithm allow to use it for a lot of other
> things than cryptography. When a dictionary (a list of all the English
> words) is used as set, it is possible to securely replace a word from a
> plaintext with another one from the dictionary (with the condition of the
> plaintext word being in the dictionary). This idea led me to design a
> steganography technology and last week I released a demo of it at:
> http://steno.io
>
> Encrypting the phrase "*This is a test.*" with the password "*mypassword*"
> would result in a ciphertext like "*uncomplimentary threateningly.
> conceptually secures on pockiest.*". This technology has principally two
> advantage :
>
> - Since the ciphertext is made of words it attracts far less attention.
>
> - The ciphertext can be sent by other mean than electronic communication
> simply by written it down on a paper, making it a lot harder to track.
>
> This is an alpha version, there is a lot to improve but if people are
> interested by this technology we can do some nice things with it.
>
> What do you think ?
>
> _______________________________________________
> The cryptography mailing list
> cryptography at metzdowd.com
> http://www.metzdowd.com/mailman/listinfo/cryptography
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.metzdowd.com/pipermail/cryptography/attachments/20140716/b48f8abc/attachment.html>