By Jim Finkle and Louise Egan BOSTON/OTTAWA (Reuters) – Canadas tax-collection agency said on Monday that the private information of about 900 people had been compromised as hackers exploited the Heartbleed bug, and security experts warned that more attacks will likely follow. The breach allowed hackers to extract social insurance numbers, which are used for employment and gaining access to government benefits, and possibly some other data, the Canada Revenue Agency said.