What's the difference between a security and utility token?

litepaper.com

5 pointsDanFromSR3 comments

well a security token has some clock or chip to issue mathematically hard sequences so you can log in. I have no idea what a utility token does

Utility tokens are tokens that give you access to a product or service produced by a company.

The whole world of blockchain confuses me but I found this like the only useful, simple ELI5 explainer so far.