Metadata includes information about who the message is sent to, when the message was delivered, and more. When you send out a message or a photo, you are also sending out metadata.

While they use the same encryption, Signal has a number of security advantages over WhatsApp: Metadata protection

This protocol is open-source and peer-reviewed, making it trustworthy. WhatsApp and Signal both use the same encryption protocol developed by Open Whisper Systems. What exactly is behind this assertion? Between Signal and WhatsApp, which one is better? Read on for a detailed comparison. Even we frequently recommend Signal as the most private messaging app out there. However, we often hear that Signal is more private and secure than WhatsApp. End-to-end encryption makes messaging more secure by making it impossible for any third party, including the app maker itself, to see the message contents. This technology works by scrambling the messages so that only the sender and receiver are able to put them back together. WhatsApp and Signal both offer end-to-end encryption.

Private signal messenger