Home security camera using webcam?

I want to install a security camera at home using web-cams connecting to a PC and upload it to the internet. So that I can access to it and stream the video live anywhere using my iPhone in real time. Is that possible and how?

It is possible, yes. There are several ways to go on this - either expensive systems set up by professionals for you with multiple webcams etc (which will mean almost no hassle to you) or to set up your own system. This is harder as it requires some setup from your side - but it is still relatively easy. Have a look at this link:

http://iphone.appstorm.net/how-to/remote/monitor-your-home-from-anywhere-in-the-world-with-icam/

Yes you can do this. You can see videos of you home from anywhere. And this will make your home more secure. You can use your webcam or you can use external webcam which already has microphone in that and better resolution. You will be able to see more clear picture of your home.