Proving a negative is in many cases a fool's errand. In your particular case you're using a logical fallacy called "argumentum ad ignorantiam" (Asserting that something is true simply because it has not yet been proven false).
Anyone with a math background, a technical background, a law background, or or a formal-logic background will automatically feel uncomfortable with the kind of claims you're making. Though they may not be able to articulate why they don't trust you, I'd wager that's the underlying cause.
To gain trust, you'd need to restructure your offering, brand, and marketing efforts in a logically valid and sound way. Think about what you can prove logically; don't overstep or use hyperbole, and err on the side of conservative claims. Then people might warm up.
You scrapped to original software and re-created it. You don't appear to have done much to the website.
The website is toxic. It is full of signals of a poor quality product. I mentioned some of these in your other thread.
Doing a web search for the product returns a bunch of really suspicious links.
http://topdownloadebook.siterubix.com/download-webcam-blocke...
http://farmhousekitchen.us/blog/2014/08/20/webcam-blocker-pr...
http://www.cbengine.com/id/tg1264
These links are toxic and harm your reputation.
The clickbank stuff -the footer on the website especially- is weird and makes me trust the product less.
And then you make extraordinary claims that are not true.
I know that a single person working alone has not created software that is impossible for hackers or government agents to defeat.
Don't make claims that you can't justify.
Also, geez, the other thread was 8 hours ago and this one was 3 hours ago. It takes more than 5 hours to "build trust" and establish good relationships with prospective customers.
I don't think anyone can give you the explanation in a nutshell. Building trust takes time and effort and problem solving. Yelling at people or whining at them about "why don't you like me?" or something only adds fuel to the fire.
At the end of the day, HN is full of very technically minded people, including security experts, programmers, and researchers. You're not going to be able to sell to these people without seriously backing up your claims.
It's a bit confusing. Poster says it's a showHN, but then claims that the website and domain and software were bought from someone else, and that the original software was scrapped because it didn't work and was re-written from scratch.
The website made extraordinary claims but didn't do much to support those claims.