Eduardo Saverin, who co-founded the world’s largest social network with CEO Mark Zuckerberg, keeps a low profile on Facebook these days. Why? Even he’s concerned about online privacy.

“I don’t like showing my privacy,” Saverin said in a rare interview with the magazine Veja.

As Facebook nears a billion unique users, the question of privacy has dogged the social network -- and not just users worried about who will see their private photos or have access to the personal information, it seems.

Ironically, Saverin touted the interview on Facebook, describing Veja as “the top magazine in Brazil -- which I used to read when I was young.”

Saverin, who made billions off the world’s most popular social network, made headlines in mid May with his decision to renounce his U.S. citizenship for residence in Singapore, where there is no capital gains tax.

Had he remained a citizen, Saverin would have been hit with about $600 million in capital gains taxes whenever he sold the Facebook shares.

Veja nevertheless described him as “An American Hero.”

In the interview, Saverin denies fleeing the country in order to avoid the tax penalty. “The decision was only based on my interest in working and living in Singapore,” he said. “I have and will pay hundreds of millions of dollars in taxes to the U.S. government.”