Paul O'Brien

A practical guide to using YubiKey and other security keys with Proton Pass for stronger two-factor authentication.

Messaging apps didn’t replace email. Here’s why email still matters for identity, recovery, and trust online.

Email began as a simple way for researchers to leave messages on networked computers. Decades later, it remains one of the few communication systems that works across companies, countries, and devices — and still underpins much of our digital life.