CDC director endorses Pfizer booster for frontline workers iPhone 13 is on sale: Best deals China: All cryptocurrency transactions illegal Elon Musk and Grimes 'semi-separated' PS5 restock tracker Google Doodle honors Christopher Reeve

Clinton campaign said to switch to 'Snowden-approved' Signal messaging app

Edward Snowden tweets about the Clinton campaign's seeming seal of approval for his app suggestions.

This isn't the first time "Hillary Clinton" and "email" have been in the same sentence.

David Becker, Getty Images

Following suspected Russian hacks of the DNC and the subsequent release of email messages through WikiLeaks, the Hillary Clinton campaign is said to be taking security advice from an unusual source: Edward Snowden.

According to a new Vanity Fair article, campaign staffers were told: "If anyone was going to communicate about Donald Trump over e-mail or text message, especially if those missives were even remotely contentious or disparaging, it was imperative that they do so using an application called Signal...Signal, staffers in the meeting were told, was 'Snowden-approved.'"

Signal is a messaging app for iOS and Android that allows for encrypted communication.

Snowden tweeted about this unusual endorsement shortly after the article was published.

The Clinton campaign has not yet responded to a request for comment about what messaging apps staffers are using.