https://en.wikipedia.org/wiki/I2P
http://wikireality.ru/wiki/%D0%A3%D1%81%D1%82%D0%B0%D0%BD%D0%BE%D0%B2%D0%BA%D0%B0_%D0%B8_%D0%BD%D0%B0%D1%81%D1%82%D1%80%D0%BE%D0%B9%D0%BA%D0%B0_I2P_%D1%81%D0%B5%D1%82%D0%B8