The Pentagon’s inspector general has received evidence that the military plans shared from Secretary of Defense Pete Hegseth’s Signal account to a group chat earlier this year were taken from a US ...

An operator’s failure to obey a stop signal was the probable cause of an Oct. 1, 2024, derailment of a Massachusetts Bay ...

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 professor ...

In 1977, the Ohio State University’s Big Ear radio telescope received an unusually strong narrowband radio signal, leading to widespread excitement about the possibility of having encountered evidence ...

You can invite someone to Signal using the "Invite Friends" menu in the app, which will send a text message or email.