If you travel with sensitive data, you know there are always risks that your information could be lost or stolen. Depending on the nature of your data, that could be a disaster. To that end, you might want to consider encrypting those flash drives. Once encrypted, a passphrase will be required to gain access to said data. No passphrase, no data.
You might think this would be a challenge, or require extensive use of the command line. Fortunately (for those that prefer the GUI way of things), there are two tools that make this process incredibly simple.