Signal App Tests Metadata Removal Technique

Signal App Tests Metadata Removal Technique

Secure messaging app Signal announced this week that it is testing a new technique that will minimize metadata in communications that may be accessible to its servers.

Signal says that its “sealed sender” technique should remove most of the plain-text sender information from message headers. It will use two new devices to avoid privacy risks: short-lived, encrypted sender certificates that store the sender’s phone number, public key, and expiration timestamp, and delivery tokens derived from the sender’s profile key which will prevent abuse.

Source: ARS Technica

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