Material categorized as “controlled unclassified information," while not secret, is still considered sensitive enough that military service members are prohibited from discussing it on unsecured ...

Sources say the national security adviser and his team made at least 20 group chats on the commercial messaging app.

Sources tell CBS News the Signal chat involving senior Trump administration officials included sensitive intelligence Israel ...

A Pentagon-wide advisory that went out one week ago warned against using Signal, the messaging app, even for unclassified ...

but nobody would disagree that it is sensitive and shouldn't be released to the public. At the Pentagon, it's called "Controlled Unclassified Information" that you normally don't release to the ...

However, transmitting controlled but unclassified information ... He redacted some of the information he deemed potentially sensitive, including the name of a CIA agent who Ratcliffe had named ...

With IL5 compliance, AGC is authorized to host Controlled Unclassified Information (CUI), mission-critical information. AGC's designation confirms its ability to handle highly sensitive ...

The inspector general review follows revelations that top Trump officials used the unclassified platform Signal to coordinate ...

The National Security Agency sent a bulletin in February warning of Russian hackers trying to access encrypted conversations on Signal.