The adversarial context is everything, but it doesn't exist in most case, because the blockchain is not self sufficient, it needs an external authority to make

The adversarial context is everything, but it doesn't exist in most case, because the blockchain is not self sufficient, it needs an external authority to make what's written on it relevant. As for diplomas, I didn't choose this example at random. A lot of startups are trying to sell exactly that. I've been approached myself multiple times about that. And some higher education institutions already do it…