Signal is available on the iPhone’s App Store and the Google Play Store for Android devices. You must have a phone number capable of receiving a text message or phone call, since a verification ...

Signal is owned by the nonprofit Signal Foundation, which was set up by co-founders Moxie Marlinspike and Brian Acton to support the app's operations as well as "investigate the future of private ...

NSA warned about using Signal a month before leak of Houthi strike chat The National Security Agency sent out an operational security special bulletin to its employees in February 2025 warning ...

If this Signal chat was real, I reasoned, Houthi targets would soon be bombed. At about 1:55, I checked X and searched Yemen. Explosions were then being heard across Sanaa, the capital city." ...

Signal was launched in 2014 for iOS devices by a non-profit group, Open Whisper Systems, which offered users free encrypted calls and, one year later, encrypted instant messaging.

The March 18, 2025, Pentagon memo adds, "Please note: third party messaging apps (e.g. Signal) are permitted by policy for unclassified accountability/recall exercises but are NOT approved to ...

The private messaging Signal is not a secure government network but it is used by many government officials and journalists. NPR's Leila Fadel talks with Matt Blaze, cybersecurity expert and ...