A bankruptcy judge said yesterday that Energy Future Holdings Corp. doesn't have to name names of the contenders as it searches for a lead bidder to open an auction for rights to its valuable Oncor stake, Dow Jones Daily Bankruptcy Review reported today. The ruling from Bankruptcy Judge Christopher Sontchi means that unhappy creditors won't get a peek behind the curtains of a process that they say could cost them billions of dollars. "The identity of bidders and bid details are off the table" as creditors question company officials in advance of an Oct. 17 court session where Energy Future will seek approval on rules for the auction, Judge Sontchi said at a hearing yesterday.