J. Fingas reports:
Signal’s reputation for secure messaging doesn’t make it completely invulnerable to hacking incidents. The company has confirmed that a data breach at verification partner Twillio exposed the phone numbers and SMS codes of roughly 1,900 users. As TechCrunch observed, the intruder could have either used the information to either identify Signal users or re-register their numbers to other devices.
The data has already been misused.
Read more at Engadget.