In a report published in the magazine Fast Company, author Michael Grothaus highlighted the recent reports that many travelers found hidden surveillance cameras on the properties and rooms they rented through AirPP, although the site prohibits hosts from putting cameras on their properties Without informing the tenants.

In January, Fast Company published a report on a computer science professor at Carnegie Mellon University that discovered two cameras hidden in the rooms he and his family rented.

Last month, the Atlantic magazine reported that a New Zealand family had rented a property in Ireland to find out later that it had a secret security camera that was recording live video.

So if you are concerned about the presence of spy cameras on the property you have rented or the hotel you are staying in, follow these steps to find them:

Pay close attention to exotic electronic accessories shape
Large-sized smart devices often have a hidden camera inside them. Travelers are therefore advised to pay attention to the presence of exotic electronic gadgets or accessories. It may be difficult to detect a hidden camera, especially since it has become too small to be virtually invisible in any device.

For example, if you find it in the bathroom or anywhere else you do not expect, it may be a sign that it is suspicious.

If you find a USB plug on the wall and it is directed towards your bed or bathtub, make sure that there are speeches. Monitor these accessories and make sure they are not prominent in your vision.

Computer science professor discovers two hidden cameras in rented rooms and his family (Getty Images)

Manual light to detect camera lenses
The flashlight can be used. The camera lens is usually made of glass, which is one of the most reflective materials, so it is easy to detect hidden camera lenses if they reflect light inside the room.

All you have to do is turn off the lights and use your phone as a flashlight and guide it around the room. If you notice a reflection of light coming from a device, check it closely, you may find a hidden camera.

Applications check the Wi-Fi network
Video scans may not always be enough to find hidden cameras, but the good news is that there is a better way to detect these cameras.

All modern hidden cameras use Wi-Fi technology, allowing online streaming of images. But the adoption of these devices secretly on the wireless signal to broadcast the footage on the Internet makes them vulnerable to detection.

Smartphone users can use applications such as the FING application available on the OS and Android operating system, which displays all wireless devices connected to a Wi-Fi network.

After accessing your rented room or property, connect to a Wi-Fi network with a network scan using the application, and then view all devices connected to the same network.

Smartphone users can use applications such as Fing, which displays all wireless devices connected to Wi-Fi (Getty Images)

Wireless Frequency Detector
If your host has another private wireless network that you can not access, applications that display all wireless devices connected to a Wi-Fi network will not work.

In this case, the only solution is to use a wireless frequency detector that can locate devices - which emit radio frequency signals - by issuing a beep.

This small device can be purchased from the Amazon site at a price of between thirty and fifty dollars.

What should you do when you find a hidden camera?
You should contact the host directly and report the camera as soon as it is found, or inform the police if you want to, especially as the laws regarding the placement of hidden cameras vary by country or region. If you can not access the host, simply disconnect the power from the camera.

The report stressed that the camera is not the only devices that we should pay attention to. The smart sound amplifiers contain microphones that can record and listen to your conversations.