State Department says it is monitoring AI-driven impersonation of secretary; details withheld

State Department spokesperson Tammy Bruce said the department is "aware of this incident and is currently monitoring and addressing the matter," and that officials were limiting public detail "for security reasons." Bruce made the comments at a State Department press briefing after reporters asked whether an impostor had used an AI-generated signal to impersonate the secretary of state when contacting foreign and domestic officials.

Why it matters: Impersonation of a senior U.S. official using synthetic signals could interfere with diplomacy, emergency responses and trusted communications between governments. Bruce said the department takes cybersecurity and safeguarding of its information seriously and is taking steps to improve its cybersecurity posture.

Bruce declined to say whether the incident amounted to a breach or whether another agency or outside actor discovered it. "We do not have any further details to provide at this time," she said. She added that department staff were constrained in what they could say while investigations continue but that "when there is something to report, everyone here will hear it first."

Reporters pressed for confirmation that no one had gained access or that no damage occurred; Bruce said she would not discuss whether that was the case and again cited investigative and security concerns. She also declined to attribute discovery of the incident to any particular agency.

The briefing did not produce further technical details about the method used to impersonate the secretary, the scope of communications affected, or whether any classified systems were involved. Bruce repeated that the department is monitoring and taking steps to improve its cybersecurity posture, but gave no timeline for additional public updates.