Later On

A blog written for those whose interests more or less match mine.

Scam to get free food

leave a comment »

This is cute:

How to Get Free Food at a Fast-Food Drive-In
It’s easy. Find a fast-food restaurant with two drive-through windows: one where you order and pay, and the other where you receive your food. This won’t work at the more-common U.S. configuration: a microphone where you order, and a single window where you both pay and receive your food. The video demonstrates the attack at a McDonald’s in — I assume – France.

Wait until there is someone behind you and someone in front of you. Don’t order anything at the first window. Tell the clerk that you forgot your money and didn’t order anything. Then drive to the second window, and take the food that the person behind you ordered.

It’s a clever exploit. Basically, it’s a synchronization attack. By exploiting the limited information flow between the two windows, you can insert yourself into the pay-receive queue.

It’s relatively easy to fix. The restaurant could give the customer a numbered token upon ordering and paying, which he would redeem at the next window for his food. Or the second window could demand to see the receipt. Or the two windows could talk to each other more, maybe by putting information about the car and driver into the computer. But, of course, these security solutions reduce the system’s optimization.

So if not a lot of people do this, the vulnerability will remain open.

Written by Leisureguy

12 September 2007 at 9:50 am

Posted in Daily life

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: