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The messaging app chosen by Edward Snowden has made it even safer from prying eyes. While Signal is already sending end-to-end encrypted messages, the company has made them even more secure. As Signal explains in a blog post, this allows the sender of a message to be completely anonymous in the message's metadata. thus, not only an outside party could not read the contents of a message if it is intercepted in transit, but it can not even see who the message is sent to. The feature is called "sealed sender". As Signal explains:
When you send a traditional physical mail, the outside of the package usually includes the address of the sender and the recipient. The same basic components are present in a Signal message. The service can not "see in" the contents of the encrypted packet, but it uses the information written on the outside of the packet to facilitate the delivery of asynchronous messages between users.
Although the service still needs to know where a message should be sent, ideally it should not need to know who the sender is. It would be better if the service could handle packages in which only the destination is written externally, with a blank space in which the "from" address was located.
For the moment, the feature is available in the beta versions of the Signal application, but it will be offered to all users in the future. When it will be, it will be enabled by default.
Technology Preview: Sealed Sender for Signalhttps: //t.co/4bNbIbQWZI pic.twitter.com/AsCk0mhh4y
– Signal (@signalapp) October 29, 2018
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