I must give you an upvote as your talk makes more sense to me...

I must give you an upvote as your talk makes more sense to me than the company's website and presentation, whether your understanding is correct or not.

By your understanding, this SIN device is a hardware device that does the encryption before your terminal hooks up to the internet, right? In that case what's the difference between this SIN and VPN? Lots of VPN hardware out there, including many cheap domestic routers.

Also what does that mean "invisible"? All VPNs are invisible depends on how you define it. And cracking the data encryption is basically very hard, with any latest industrial open source algorithms. But if you have a super computer, even better with future quatum computing, nothing is non-crackable with brute force.

Maybe it's a good idea to check with some customers how this works - but again, if the company cannot clearly explain to the investors how their products work, why bother?