If you are considering using a nanny cam to observe your childcare provider, you may be putting your personal security at risk. Many wireless video cameras do not have security features that block third party users from tapping into the signal. This means that the images from your home could be tapped into by anyone who has a digital eavesdropping device. While it is illegal to eavesdrop using telephone technology, there are no such laws to prohibit stealing images. If you are purchasing a hidden surveillance camera, make sure to ask your electronics dealer about the security level of the camera and whether the signal can has encrypted transmission.