One-third of companies said in a recent poll that a major security breach could put their company out of business, according to a report from McAfee. The security company unveiled a study Tuesday showing that 33% of respondents said they believe a major data-loss incident involving accidental or malicious distribution of confidential data could put them out of business. To protect customers, employees, and shareholders, data loss prevention needs to become a top priority at every level of the organization, from the board room to the lunch room.