The anonymity and security is handled by the i2p network, there are details concerning how on thier website. The website explains such things far better than I could, really there is no need for people posting to forums to submit such details. Additionally for live discussion concerning i2p, there are irc channels. Also you could check out thier forums as well.

If you are already familiar with the tor project, then simply put this is a simular encrypted anonymising overlay network, only it works much better and has decent client applications, better internal websites, etc.