Here's an example. Take the word "Attack". In Morse it's: .- - - .- -.-. -.- Now consider the phrase: Isn't the Japanese tea tradition pure artistry?

Here's an example. Take the word "Attack". In Morse it's: .- - - .- -.-. -.- Now consider the phrase: Isn't the Japanese tea tradition pure artistry? Remove all but the "i"s and "t"s: it t t titi iti Replace all but the tittle of the i and the crossbar of the t, giving: .- - - -.-. -.- Poof, side-channel communications in a way which gets through this filter. Another tricky technique acronyms characters, kazaam!