Companies often turn to DRM software like Liquid Machines, Active Directory RMS, etc. Of course these won't stop a determined thief with access and motive from

Companies often turn to DRM software like Liquid Machines, Active Directory RMS, etc. Of course these won't stop a determined thief with access and motive from photographing or transcribing data, but it can be useful to protect against redistribution of complex work (such as the Excel spreadsheets upon which more than a few substantial businesses are built).