The piece addresses the problems that arise when companies misplace trust in people -- employees, customers, partners, vendors, etc. The truth is, they're all crooks!
Not really, or at least not according to Ed Adams, CEO of Security Innovation and author of the column. But Adams says enterprises should make no assumptions regarding either the trustworthiness or security awareness of people with enterprise access, or the security inherent in their enterprise applications. Because when you assume...well, you know the rest.
But before you go dashing off to the link above, I refer you to this link, which is the introduction to Adams' multi-part series on "The Five Most Common Misconceptions of Enterprise Security." You may as well start at the beginning.