Equifax Inc., the credit reporting agency that was the subject of a massive hack earlier this month, said it believes about 100,000 Canadians are affected. The information leak involves personal information including names, addresses, social insurance numbers and, in some cases, credit card numbers, it said in a Tuesday press release. The company said shortly after it announced the breach — which occurred between mid-May and through July and was announced on Sep. 7 — that Canadians were affected, but didn’t specify the number of people. It initially believed that the breach was...