It's a little hard to tell, exactly, but it seems that the Saudi's hack of Bezos' phone probably involved some keylogging. Apparently, they used Pegasus spyware, which:

"secretly enables a jailbreak on the device and can read text messages, track calls, collect passwords....." - wikipedia

Although there are a lot of denials and accusations about fake news going on about this, CNBC still ran the story.

Also in the same article are hints to help avoid attacks like these. Alas, no mention of SFT's patented software solutions.