There are a whole lot of ways for sensitive information to leak from your organization, and most of them wouldn’t be prevented by data leak prevention tools, according to a new report issued today. In a detailed study of 887 leak incidents, the Information Security Forum — an international, non-profit consortium of security-focused enterprises and vendors — found that many leaks are caused accidentally, often through non-technical means. “Think about how often you hold the door open for a stranger carrying something heavy, or what you can overhear in a conversation on an airplane,” says Simone Seth, senior research analyst at ISF. “That’s the sort of thing we found over and over again in the study.” While there have been many studies recently on insider attacks, most of them focus primarily on online leaks, without taking into account the “old” sources of leaks that have been around for years, she observes.