... only the recipient and you have the special key needed to unlock and read them. But we know where your key is kept and can easily get it should we feel like it.
If you only know about software from vendors, writing software to sell it, maybe you should look around more?
Anyhow, all kinds of treatment are fair game if you're a certain distance along on a path with lots of rain and little sunshine. Well, as long as they're actually perhaps maybe possibly functional.
However, trash vermin talking hope with pseudo science such as Dispensa with his quantum field nonsense is really terrible, and it catches desperate people so badly, in Basel, Switzerland, he filled a hall of 2000 people (even 2 days in a row iirc), selling out in a day or so for 500 or 1000 CHF per person. Yes, that's a cool million plus for an afternoon blabbing nonsense....!
Speed of a tortoise breaking the sound barrier = 1 Machturtle