Eccentric entrepreneur and privacy advocate Kim Dotcom is building his own private internet, allegedly safe from the prying eyes of surveillance authorities.

Via video link at Sydney's SydStart conference this week, the web mogul explained that "MegaNet" will work on a non-IP-based internet "that uses the beauty of blockchain [Bitcoin's public ledger] and new protocols to communicate and exchange data", while still using the internet's existing physical infrastructure.

Eccentric internet entrepreneur Kim Dotcom in New Zealand last month. Credit:Peter Meecham

"If you don't have IP addresses you can't hack the server, you can't execute denial of service attacks on gaming services or websites," Dotcom said from New Zealand, where he is currently awaiting the result of an extradition trial.

"Most importantly it will make it difficult for governments to invade our privacy. This entire network I'm working on is fully encrypted. It literally works from the people for the people."