It's much easier to use apps that support end-to-end encryption than it used to be, but it's still good to know how it works. https://ssd.eff.org/module/deep-dive-end-end-encryption-how-do-public-key-encryption-systems-work
A Deep Dive on End-to-End Encryption: How Do Public Key Encryption Systems Work?
If you haven’t yet, we recommend reading a few guides before this one, to help cement some of the concepts discussed here: What Should I Know About Encryption?, Key Concepts of Encryption, and Key Verification. If used correctly, end-to-end encryption can help protect the contents of your messages, text, and...