The man behind an attack on AT&T Inc. that exposed personal information for users of Apple Inc.'s iPad pleaded guilty last week in federal court in Newark, N.J., The Washington Post reported June 23.

Daniel Spitler confessed to being a participant in the hacking group Goatse Security. The group exposed the email addresses of 114,000 iPad owners.

"Computer hackers are exacting an increasing toll on our society, damaging individuals and organizations to gain notoriety for themselves," U.S. Attorney Paul Fishman said in a prepared statement. "Daniel Spitler's guilty plea is a timely reminder of the consequences of treating criminal activity as a competitive sport."