This article seems to confuse some terms.

Just one little example

> ...offers an additional layer of encryption, where messages can get deleted after a specific time.

That’s not encryption. That’s application logic which you must trust is working on the recipients device as well as yours.

There are a lot of other mistakes. It seems like regurgitated blog spam, and I won’t spend time correcting the rest of it.

doing some quick googling shows these clearer, shorter, and more correct articles:

Very short explainer: https://protonmail.com/blog/what-is-end-to-end-encryption/

More in depth: https://ssd.eff.org/en/module/deep-dive-end-end-encryption-h...