Full Disk Encryption is a storage encryption technology that secures a computers and mobile devices by encrypting all the data at rest on the hard drive.
Computers
Mobile Devices
A faraday bag is a sealed device that prevents your cell phone from receiving or sending radio frequency signals. You can make one yourself or buy one online. This is the only secure way to prevent cell phone tracking, though there are half-measures that provide some protection. Given the ways most people currently use cell phones, a faraday bag or other half-measures can be very inconvenient.
Other ways you can reduce tracking:
The US and many other national governments allow legally intrusive inspection of electronic devices at the border. Be prepared when crossing national borders.
