How to foil cyberspies on your business trip

New York

THE admonitions to business travellers headed to other countries should be familiar by now: Keep your laptop with you at all times. Stay off public Wi-Fi networks. Don't send unencrypted files over the Internet.

But not all travellers heed them, and many are unaware of the foreign hackers and state-sponsored spies who are taking advantage of their lax security practices.