Show HN: Proof of Position(proofofposition.com)

17 pointsby charleyhinevor 12 Jahren10 comments

http://proofofposition.com

5 comments

swangvor 12 Jahren

I kinda like the concept, except there is no way to prove you were there in the first place. It just proves you inputted a set of GPS coordinates at a specific time and can prove that.

danbrucvor 12 Jahren

Why? And even if there is a good reason this does not work because you can not prove that you actually were at the location you encoded into the block chain.

charleyhinevor 12 Jahren

Why? Wanted a decentralized database of memorable places I've visited.

Proof? The key pair signing the transaction proves it originated from this service. HTML5 geolocation data could be incorrect in the same way a Foursquare check-in doesn't prove one is actually at a given venue.

danbrucvor 12 Jahren

But why put it into the block chain instead of a database?

tg3vor 12 Jahren

My guess would be the decentralized nature of it. Even if this service goes away (like Foursquare could), your check-ins with service won't (at least until the blockchain dies, which is presumably longer than an individual company).

danbrucvor 12 Jahren

I thought of that, too, but then - with bitcoin still in its infancy and far from sure to survive the next five years - I think that a cloud service is a far safer bet than the block chain. Or just have your own database on the site hosting the website.

Coffeewinevor 12 Jahren

It's quite unclear to me - how much does it cost to store this data in the blockchain? I'm imagining the quantity must not be nil as otherwise it'd be possible to DOS the blockchain by supplying a large quantity of useless data.

ianpurtonvor 12 Jahren

Long story short 0 or 0.0001 BTC.

Long story - It depends on the inputs to the transaction you want to make.

eglovervor 12 Jahren

With all the paranoia over privacy right now, I don't think too many people will buy into it.

recursivevor 12 Jahren

GPS spoofers are built into most major browsers.