The group hacked information, including the names, street addresses and email addresses, of 74 Canadians from two websites: Blood and Honour, and Local 1488, a site selling Nazi paraphernalia.
The hacked information was part of a wider haul, including pictures of a young boy giving a Nazi salute, and 142 emails from people who had joined Blood and Honour's online forum.
Details hacked from the forum were posted to the site Nazi-leaks.net, which has since been taken offline.
Names in the hacked list include Alistair Miller and Robertson De Chazal. Both had been charged with setting alight a Filipino man who was sleeping on a couch in British Columbia's East Vancouver district. Bill Noble, a Canadian who had been convicted for promoting hatred in 2008, was also fingered on the leaked list. He called for the "extermination" of hackers who were "interfering with the survival of an endangered race".
This is not the first time that Nazi groups have been hacked. Blood and Honour's forum was infiltrated by German anti-fascist group Daten-Antifa in 2008, when 800Mb of data was taken. The information is still publicly downloadable.
