Nigerian live sex cam
The scammer may pretend to be an attractive, potential partner and strike up an online relationship with you.
It may take some time and seem extremely believable.
But criminologists say the victims, too, share certain personality traits that increase their susceptibility.
Greed and gullibility obviously figure in, as do such tendencies as being a risk taker, succumbing easily to flattery or intimidation and failing to take an interest in news and current events.
In days gone by, the scammers had to canvass potential victims one at a time by fax and snail mail; now they have the speed, cost-effectiveness and anonymity of the Internet at their disposal, and they're taking full advantage.
Some victims have been extremely distressed following this realisation, with tragic consequences.
In another type of webcam-based scam, malware installed on your computer can be used to operate your built-in webcam, recording images of you without your knowledge. Stay Smart Online offers a guide to safe social networking, as well as some useful insights into real life scams - online dating.
Scammers may use carefully prepared webcam images or footage of themselves which may initially seem flattering, but can increasingly become coercive and explicit.
They steadily increase pressure on you to participate, which they record and later threaten to distribute online.