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Welcome to Tech News Briefing. It's Monday, April 1st. I'm Alex Oscela for the Wall Street Journal. Today we're talking about cyber security, how individuals can stay safe, and what happens to companies when hackers break in.

First up, using unsecured public Wi-Fi could put your devices at risk.

But what about the Wi-Fi on a plane?

W.S.J. contributor Heidi Mitchell tells us how you can protect yourself at 30,000 feet.

And then, MGM Resorts Las Vegas Hotels and Casinos were thrown into chaos after being hit with a... MGM's Robert McMillan breaks down what happened and tells us why the cyber attack serves as a warning to other companies.

But first, airplane Wi-Fi is far from perfect. It can be glitchy or slow, that is, if it works at all.

But can using it actually be unsafe?

W.S.J. contributor Heidi Mitchell joins me now with more.

Heidi, what is the concern about using airplane Wi-Fi?

So when you're on a plane, oftentimes you can receive these air drops that are unsolicited onto an Apple device.

Those can often carry a malware which could include a key logger,

which will record every single stroke you're making on your computer.

So any password you're logging in, they can use that later to do all sorts of terrible things to

...