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Welcome to Tech News Briefing. It's Wednesday, March 26th. I'm Victoria Craig for the Wall Street Journal.

Signal is the app for spies, journalists, and apparently senior White House officials. What is it?

And is your data safe there? Then, putting a car through a round of stress testing takes Ford about 15 hours.

An AI-trained prediction model, though, takes just 10 seconds.

We'll chat carmaking in the age of artificial intelligence.

First, if it's good enough for the White House, is it good enough for me?

That seems to be the question many people are asking about the messaging app signal.

Interest has skyrocketed on mobile app stores since the Atlantic reported senior White House

officials discussed plans on signal to launch airstrikes in Yemen.

Controversy has swirled around administration officials' decision to use the app for military operation discussions.

But if you're confused about what exactly Signal is and how secure it can be,

WSJ Tech reporter Sam Shetner has the answers.

For listeners who have never used it before, who have never heard of Signal until today, what is it used for?

Signal is a chat app that works on your phone or your computer actually to have a desktop app.

It's kind of like WhatsApp or iMessage, and it's encrypted.

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