Hello, lately messaging apps' privacy policies have been a hot topic. Some offer end-to-end encryption while others continue to store data. Do you think there's really a way to stay anonymous? Is end-to-end encryption enough or do we need to trust third-party apps? How do you make your own choice?
How important is privacy in chat apps?
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End-to-end encryption (E2EE) is absolutely critical because it guarantees that only the intended recipient can read your messages—no service provider or third party can access them. However, there’s an important caveat: how this encryption is affected by *authentication*. We know WhatsApp offers E2EE, but the default synchronization of your phone number directly compromises your anonymity. Even if you disable synchronization, metadata (who you talk to, how often) can still be collected. What about apps that try to offer "anonymous" identities? Even Signal, for example, ties users who don’t get a new phone number directly to their phone number. Registering with an alternative identity (e.g., an email address) may reduce metadata collection, but it doesn’t guarantee full privacy.
Another issue is *key management*. For E2EE to be secure, the app must properly store and sync keys—not just on the recipient’s device, but on yours as well. For instance, Telegram’s "Secret Chats" feature does offer E2EE, but its default messaging isn’t end-to-end encrypted. As you can see, no matter which method you choose, your privacy ultimately depends on the end user. When making your choice, you should also consider whether the *apps are open-source*—closed-source apps may carry risks like backdoors or hidden data collection. So, how do you minimize the impact of metadata collection on anonymity?
Compare that to the filters of old Hotmail when sending farewell emails, and you could say that end-to-end encrypted software is almost completely in the dark. Having to rely on third-party apps is like using an advertising company’s archive that tracks everything online—so it’s best to start with local and open-source options.