They have also become a source of security and privacy issues, as some built-in webcams can be remotely activated by spyware.
The most popular use of webcams is the establishment of video links, permitting computers to act as videophones or videoconference stations.
However, the firm, which is responsible for the 'internet address book' data for 6 million websites, has revealed that in fact, they are a key part to how it keeps the internet secure.
The lamps are constantly recorded by a webcam, and the lava movement analysed to help the firm create truly random numbers to power its encryption software.
The term "webcam" (a clipped compound) may also be used in its original sense of a video camera connected to the Web continuously for an indefinite time, rather than for a particular session, generally supplying a view for anyone who visits its web page over the Internet.
Some of them, for example, those used as online traffic cameras, are expensive, rugged professional video cameras.
When sent to a remote location, the video stream may be saved, viewed or on sent there.
Unlike an IP camera (which connects using Ethernet or Wi-Fi), a webcam is generally connected by a USB cable, or similar cable, or built into computer hardware, such as laptops.making them the lowest-cost form of videotelephony.Despite the low cost, the resolution offered at present (2015) is rather impressive, with low-end webcams offering resolutions of 320×240, medium webcams offering 640×480 resolution, and high-end webcams offering 1280×720 (aka 720p) or even 1920×1080 (aka 1080p) resolution.A webcam is a video camera that feeds or streams its image in real time to or through a computer to a computer network.When "captured" by the computer, the video stream may be saved, viewed or sent on to other networks via systems such as the internet, and emailed as an attachment.To do this we will link your Mail Online account with your Facebook account.