Bug Bounty And Vuln HuntingVuln Item

Signal E2EE privacy guarantees and 0-click vulnerability risk

April 3, 2026Black Hat

Black Hat examines Signal’s Double Ratchet foundations and clarifies what E2EE does and doesn’t protect, while also highlighting practical risk via a reported 0-click vulnerability.

Decoding Signal: Understanding the Real Privacy Guarantees of E2EE
Double Ratchet protocols
forward and backward secrecy
a real 0-click vulnerability
including the Double Ratchet protocols that provide forward and backward secrecy
highlighting risks, including a real 0-click vulnerability
Black Hat
e2eemobile security

See what authorities are saying right now

This finding is one of many signals tracked across Cyber Security. The live feed updates every few hours with new authority voices, debates, and emerging ideas.

← Back to Cyber Security