[sergiolp]

Centralization is a _huge_ privacy issue. Specially when combined with real world data, like a phone number.

Let's assume OWS is playing nice, and they really don't store any relevant metadata. How can we be sure that a third party is not eavesdropping their communications?

Even with end-to-end encryption, given enough time, an attacker can easily build a user relationship network, something _very_ dangerous in the wrong hands.

If you really care about privacy, you should consider options like BitMessage, Onion.chat, Ricochet, Tox or GNU Ring. Or, as a middle ground between those (which are quite mobile unfriendly, due to its P2P nature) and Signal/WhatsApp/Telegram, a federated service like XMPP (as the article suggest) or Matrix.