Comey and friends may be using a Fleissner grille cipher to code their tweets. There may be multiple templates, maybe made out of playing cards? Attached pics in portrait or landscape may signal orientation. #Qanon #DarktoLight @Inevitable_ET @martingeddes

Imagine a piece of stiff paper. On it is a template with holes cut out. They post a simple message on twitter that seems innocent (though sometimes weird). It means nothing unless you have that exact card code. You place that card on your phone and out pops the secret message.

I believe that when there is a picture along with the twitter post, the orientation of the picture is a hint at which code template to use to decipher. If its in landscape you use the landscape card. For portrait you use the portrait code template.

This particular pic he chose he realized it might be hard to tell the orientation since the pic might look correct in either. So he specified to the intended recipients so they knew this was a portrait coded tweet.

The tricky part is there are possibly several cards and a system to use them. (Color coding banners)? In order to pick it apart precisely you have to use the same device, same font sizes, same kerning etc (though I'd bet they were on the default of whatever device they are using)

It may be possible to be doing this with screen overlays, using some kind of app that applies the grid to the screen to see the message. That way the grid would scale to the user's phone. Also no physical evidence of the grid to leave around.

There were questions why Hanx posted tweets as a screenshot. a grille cipher may be a possible answer.

It is probably more accurate to just call it a grille cipher, as I just learned that a Fleissner grille cipher is a more complex variation of the grille cipher.

This coding is extremely simple if you know the correct template, but extremely hard to crack in reverse. A lot of work would have to be done to find the correct layouts of the templates, their number, how they are signified to be used, orientation, ect.