Nice post. I've been commenting for some time now, and it seems I've stopped getting an upvote from you, and I don't really know why.

But I sure enjoyed this particular post. I know that all the data we input here on steemit is stored on the blockchain, but I did not know how it was done.
Thanks to your post, I now know why it's being used, because it creates trust between two parties who necessarily don't see each other.
But I'll like to know who created blockchain?