On a recent trip from Boston to New York on an Acela Express train, I was writing blogs and doing some research using Amtrak’s free wireless Internet. “Free” usually translates to "unsecured," which means a criminal hacker with the right hardware and software could have sniffed out my wireless communications and grabbed my data.
https://www.openforum.com/articles/how-to-stop-criminal-hackers-in-their-tracks/