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

[Christian Huitema]

> Thank you that the kind of feedback I need. This is an alpha 
> version, there is a lot of work ahead. Since the implementation of 
> the algorithm is a little different than encrypting bytes, I didn't 
> use a security mechanism for differential attacks that was 
> present on the paper. I just added it and now this problem is 
> resolved. 

Steganography on a piece of paper? A problem with the dictionary approach is that the text does not look like a normal letter. The censors may not be able to read it, but they can see that the text stands out. A phrase like "uncomplimentary threateningly. conceptually secures on pockiest" does not look like something you would place in a letter to grandma...

Speaking of grandma, my son and I were discussing encryption variants at the dinner table, and my mother chimed in. "How, I now encryption, our network used it to send messages to French underground and intelligence service contacts!" She went on to describe a variant of grille coding. Place the letters of your message at specified points in the grille, then use your imagination to fill the rest of the text so it looks like a normal letter. So, basically, they were using steganography on a piece of paper...

-- Christian Huitema