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Federal office in charge of Ensuring cyber -safety At all levels of the Government, she cited the use of a encrypted message exchange application as a “best practice” for the “highly target” government officers, shows a document from the Biden era.
Fox News Digital found that Cibernetic Security Agency and Infrastructure Safety (CISA) was exhibited at a guide for federal employees at the end of last year who encrypted the platforms for messaging, such as signals that are better protected officials against foreign enemy hackers, in the midst of a CYBER violation related to Chinese. CISA is an office under the umbrella of the Homeland Security Department that has been charged with assurance of cyber security at all levels of government.
Under the Administration of Biden 2024, Cisa published “Guidelines for Best Practice of Mobile Communication” for “Highly target individuals”, which are defined as a high government Officers or politicians which “will probably possess information of interest in these threat actors.” The document was particularly concerned with highly targeted politicians and officials, although he noted that the guide was “applicable to all audiences”.
“Cisa strongly invites high target individuals to review and apply the best practices below to protect mobile communication. High target individuals need to assume that all communications between mobile devices are uniting government and personal appliances-internet services risk from interception or manipulation. Although none removes all risks, implementing these best practice.
The document, published in December, describes in detail that high target government officials should use “extremely encrypted communication” as part of their “best practices” tips. The encryption of the end to the end is understood as a safe method of communication, where the sender’s message encrypts and can only decipher the recipient of the message.
Trump reveals who was behind the leak of the signal text chain

The signal uses the encryption of the end to the end and is available for free through digital applications digital stores. (Arthur Widak/Nurphoto via Getty Images)
CISA guidelines specifically stated that government officials should take over the “extremely encrypted communication” platforms to their mobile phones and computers, especially citing a signal as an application to download in accordance with the best practices.

National Security Advisor Mike Waltz and Defense Secretary of Peta Hegsetth at the White House 24 February. (Reuters/Brian Snyder)
“Adopt a free message exchange application for safe communication that guarantees encryption end to the end, such as signals or similar applications,” the guidelines state. “CISA recommends an app for encrypted encrypted message that is compatible with iPhone and Android operating systems, allowing text messages on platforms. Such applications can also offer clients for Macos, Windows and Linux, and sometimes web. These applications usually support text chats, and this can be a group of talks. privacy. ”
The signal is an encrypted message exchange application that acts similar to sending messages or referring to phone calls, but with additional security measures that help ensure that communications are held with private those involved in the correspondence.
The popularity of signal has grown in the last few months after it has been revealed that hackers related to Chinese target cell phones in the United States, including data belonging to the President Donald Trump and Vice President JD Vance during the campaign, Politico reported this week.

President Donald Trump on the southern lawn of the White House before boarding Marine One in Washington on February 28, 2025. (Al Drago/Bloomberg via Getty Images)
“Cisa publishes these guidelines for the best practice for promoting mobile communication from exploitation by PrC associated with PRC and other malicious cyber threat actors,” the Cyprus Cyrus states, referring to the Chinese CYBER Duration in 2024.
Fox News Digital addressed CISA and for additional comments or information on using signals among government employees, but did not immediately receive an answer.
The guidelines were published a few months before Trump’s administration came under the fire of Democrats and other critics after it was revealed that the highest national security officers talked about a planned strike in Yemen against a terrorist forces in the chat of a signal group including the Atlantic editor -in -chief.
Atlantic Jeffrey Goldberg on Monday posted a first-hand account of what he read in the chat signal group called “Houthi PC Mala Group”, after being added to the chain on March 13, together with high federal officials who extend from the Secretary of Pete HEGSETH to the National Security Advisor and Trump’s Boss of Susie Wiles.
The Atlantic report launched a condemnation among Democratic legislators, who scored Trump’s administration for risking national security using the communication application on the planned attack on Houthhi terrorists supported in Iran in Yemen.
Trump is not planning to release Waltz after leaking the text of national security

Jeffrey Goldberg speaks on stage during the “Nancy Pelosi on the Art of Power” for the Atlantic Festival on September 19, 2024 in Washington, DC (Jemal Countess/Getty Pictures for Atlantic)
“This is one of the most striking violations of military intelligence I have read about in a very long time,” said the leader of the Senate minority, Chuck Schumer, Dn.y., upstairs.
CIA director John Ratcliffe appeared before the Senate Intelligence Committee on Tuesday morning at an annual hearing on the global threats that he faced in the US, and he was also grilled with a chat signal group.
The CIA chief confirmed that he was in a group chat involving Atlantic editor-in-chief, adding that the signal was already taken to his computer when he swore as a director in January and that the application had a long history as a communication platform for government employees who extended to the Biden administration.

President Trump and former President Biden (Win McNamee/Pool via Reuters | Getty Images)
“One of the first things that happened when I was confirmed because the CIA director was uploaded to my computer, CIA, as with most of the CIA officers, one of the things I met very early on, the senator was by the CIA to manage records on the use of signal as permitted use of work,” he said.
“It’s a practice that preceded the current administration of Biden’s administration,” he continued.
Former national security officer Biden confirmed Associated Press that the previous administration used a signal if the staff received a permit to download the application on their phones operated by the White House. According to the report, employees were told to use it frugal.

President Donald Trump speaks in the oval office of the White House on March 7, 2025. (Chris Kleponis/CNP/Bloomberg via Getty Images)
“As far as I understand Biden administration An authorized signal as a means of communication that was in line with the requests for the chairman for his administration, which he continued in Trump’s administration, “Senator Tom Cotton, R-ARK., Said on Tuesday morning during his appearance at Fox & Friends.
The Memory of the Ministry of Defense of 2023 under the Management Board of Biden described in detail that, although the Government officials approved the signal, they could not use the “access, transfer, processing of information on a weak Dod”. Cisa -and guidelines related to the signal were released after the leadership of the Ministry of Defense.
Trump’s administration defended the group chat, saying that she did not include sensitive information and that the story of the Atlantic “is nothing more than a community section to establish Natsec that leads the same, tired playing from last years.”
The Karolina Leavitt White House secretary announced on Tuesday to X that “no classified material was sent to the topic” and that “it was not discussed” war plans “.
On Tuesday afternoon, the White House Communication Director scored the coverage of the Atlantic coverage in the X mail as an example of “Anti-Trump’s forces” trying to “penetrate misinformation”.
“From Russian, Russia, Russia’s’ fraud of the first term to a case of false documents in the last four years … At every step of the anti-Trumps, they tried to arm their harmless actions and turn them into false anger that fake newspaper outlets can use to decline disinformation,” he announced in X.
Trump told NBC News on Tuesday that staff at Waltz’s office involved a journalist in a high-profile group chat but did not reveal the identity of the staff or if an individual faces disciplinary action.
“It was one of Michael’s people on the phone. The staff had its number there, ” Trump said NBC News In a telephone conversation when asked how Goldberg was added to a high chat.
Trump defended Waltz earlier on Tuesday in a Fox News comment, as well as during the NBC interview.
“He’s not dismissed,” Trump told Fox News about Waltz. The president said the incident was a “mistake”, although there was nothing “important” in the signal thread.
“Michael Waltz has learned a lesson and is a good man,” Trump said in an interview with NBC.
The president added that Goldberg’s involvement in the group chat had no effect on the strike in Yemen at all.
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The leakage of the signal group comes about 10 years after the news broke out that the then secretary of the Hillary Clinton state used the private e-mail server for the official Government correspondence.
Fox News Digital addressed the White House for an additional comment on the leakage of the signal chat, but did not immediately receive an answer.