It seems like one of those clever household tricks that costs almost nothing: wrap a little aluminum foil around your door handle, and supposedly you'll have an inexpensive way to make your home safer.
The idea has spread widely online, with different versions claiming that foil can make a door harder to open, create a warning sound if someone touches the handle, or even discourage a would-be intruder.
But when it comes to home security, it's important to separate an interesting DIY idea from something that has been shown to provide meaningful protection.
The short answer is simple: aluminum foil around a door handle should not be considered a reliable security measure. Recent explanations from home-security and home-improvement sources consistently conclude that the foil provides little or no meaningful resistance to someone attempting to enter.
That doesn't mean the viral trick is completely useless in every imaginable situation. It simply means you shouldn't confuse a temporary visual or tamper indicator with an actual security device.
What Is the Aluminum Foil Door Handle Hack?

