A US judge ordered Google to hand over log-in names of YouTube users and Internet protocol (IP) addresses identifying which computers they used for viewing videos to Viacom, in part of the gigantic court case between them.

“The court’s erroneous ruling is a set-back to privacy rights and will allow Viacom to see what you are watching on YouTube,” Google senior litigation counsel Catherine Lacavera said.

“We urge Viacom to back off this overbroad request and Google to take all steps necessary to challenge this order and protect the rights of its users.”