Signal reaffirms encryption strength amid security breach controversy

Meredith Whittaker, the President of Signal, has reaffirmed the app’s security after reports surfaced that senior US officials mistakenly added a journalist to an encrypted group chat discussing classified military operations in Yemen.

The controversy began when The Atlantic’s editor-in-chief, Jeffrey Goldberg, was accidentally included in a Signal conversation among Trump administration officials about planned airstrikes. Goldberg later confirmed the messages were real when the strikes happened as described.

While Whittaker did not address the specific breach, she took to X to emphasise Signal’s strong encryption and contrast it with Meta’s WhatsApp. “Signal is the gold standard in private comms,” she wrote, highlighting the app’s nonprofit structure, open-source nature, and lack of metadata collection.

Signal’s reputation for privacy has fueled its growing adoption among users worldwide. According to Sensor Tower, Signal’s US downloads rose by 16% in early 2025 compared to the previous quarter, with a 25% increase year-over-year.

In a recent interview with Dutch newspaper De Telegraaf, Whittaker criticised WhatsApp’s data policies, warning that while messages are encrypted, the app collects metadata that can reveal communication patterns. She reiterated that WhatsApp hands over metadata to authorities when legally required.

In response, a WhatsApp spokesperson defended the app’s practices, stating that metadata collection helps prevent spam and abuse while maintaining privacy.

The breach has reignited concerns over the use of civilian messaging apps for sensitive government discussions. Experts warn that while Signal offers robust encryption, operational security depends on how users manage the platform.

The US military has long been urged to use government-approved secure communication channels instead of third-party apps. This latest incident has renewed calls for stricter security protocols at the highest levels of government.