[Beckwith]

This is ridiculous.

The NSA has more cryptologists per square foot that any entity in the world. If you invent an entirely new font, they’ll have it countered within the week

And how does this concept affect voice transmissions?

[Lazamataz]

The NSA has more cryptologists per square foot that any entity in the world. If you invent an entirely new font, they’ll have it countered within the week three minutes.

Corrected it for you.

And how does this concept affect voice transmissions?

Simple. Speak in 'font'.