Brazil plans to divorce itself from the U.S.-centric Internet over Washington’s widespread online spying, a move that many experts fear will be a potentially dangerous first step toward fracturing a global network built with minimal interference by governments.

President Dilma Rousseff ordered a series of measures aimed at greater Brazilian online independence and security following revelations that the U.S. National Security Agency intercepted her communications, hacked into the state-owned Petrobras oil company’s network and spied on Brazilians who entrusted their personal data to U.S. tech companies such as Facebook and Google.