Warning: free hotel wifi is a hacker’s dream

Hotel systems are so leaky it’s worth investing in your own virtual private networkYou’ve just arrived at the hotel after a delayed flight and a half-hour wrangle with the car-hire firm. And then you remember that you’ve forgotten to pay last month’s credit card bill, and there’ll be an interest charge if you wait until you’re back at base. But – hey! – you can do it online and help is at hand. The receptionist is welcoming and helpful. They have w