U.S. Secretary of Defense Pete Hegseth spoke to reporters at the Pentagon on February 7, 2025, during a meeting with Australian Deputy Prime Minister and Defense Minister Richard Marles. Marles travelled to Washington to hold talks with Hegseth, officials from the Trump administration, and members of Congress. (Photo by Alex Wong/Getty Images) (Alex Wong/Photographer: Alex Wong/Getty Im)
Top officials from the Trump administration reportedly used the encrypted messaging app Signal to discuss military plans, sparking concerns over national security. Lawmakers are now calling for an investigation into whether classified information was mishandled.
What Is Signal?
Signal is a private messaging app known for its strong encryption, which prevents anyone—including the company itself—from accessing user messages. It allows text, voice, and video communication across multiple devices, requiring only a phone number for registration. Unlike other messaging apps, Signal does not store user data or track conversations, making it a popular choice for those prioritizing privacy.
Why Is Signal Considered Secure?
Signal encryption ensures that only the sender and receiver can read messages. The app does not collect data beyond phone numbers and basic login information. It also lets users set messages to disappear after a chosen period, enhancing security. Unlike other platforms, Signal does not use ads, trackers, or government-linked encryption, making it one of the most trusted communication tools.
Who Created Signal?
Entrepreneur Moxie Marlinspike launched Signal in 2012. In 2018, he partnered with WhatsApp co-founder Brian Acton to establish the Signal Foundation, a non-profit organization focused on maintaining the app’s independence. Acton left WhatsApp after disagreements over user privacy and provided Signal with $50 million in funding.
Who Uses Signal?
Originally favoured by activists and journalists, Signal has grown into a widely used app among government officials and private individuals seeking secure communication. Its popularity surged in 2021 after WhatsApp updated its privacy policy, leading many users to switch to Signal over concerns about data sharing with Facebook.
The U.S. Senate approved the app’s use for government staff in 2017, and the European Commission is also listed as a user. Despite its high security, experts question whether Signal is appropriate for discussing national security matters, especially after reports emerged of Trump aides allegedly using it to coordinate military actions.
Why Is This Controversial?
The potential mishandling of classified information has raised alarms. U.S. laws prohibit improper handling of sensitive materials, though it remains unclear if any laws were broken in this case. Analysts argue that while Signal is highly secure, its use for government-level discussions on military operations could pose serious risks.
Final Thoughts
The controversy surrounding Signal’s use by Trump aides has reignited debates over secure communication in government. While the app remains a top choice for privacy-conscious users, its role in sensitive military discussions raises important questions about national security protocols.
