Signal to shield user phone numbers by default

Chat app Signal will shield user’s phone numbers by default from now on. And, it will no longer be necessary to exchange phone numbers when people want to connect through the app. In November, we reported that Signal was testing usernames to eliminate the need to share your phone number. Signal h...

CVE-2019-15514

The Privacy Phone Number feature in the Telegram app 5.10 for Android and iOS provides an incorrect indication that the access level is Nobody, because attackers can find these numbers via the Group Info feature, e.g., by adding a significant fraction of a region's assigned phone numbers...