There are two reasons to use a blockchain: to avoid double spending in an advers... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		paulsutter on Sept 26, 2018 \| parent \| context \| favorite \| on: Walmart Requires Lettuce, Spinach Suppliers to Joi... There are two reasons to use a blockchain: to avoid double spending in an adversarial environment, and to avoid central control of a database. This application requires neither, and this implementation accomplishes neither.

pimlottc on Sept 26, 2018 [–]

I'm aware of the latter justification, but can you elaborate further how a blockchain is more effective at preventing double spending than a centralized system?

paulsutter on Sept 26, 2018 | [–]

An adversarial environment kinda rules out control by one of the adversaries (ie, whoever is running the centralized system)

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact