There's really no way to prevent an employee from taking a piece of paper or a digital file from one place to another. The most you can prevent is accidental transfer. If they are malicious they will find a way no matter what guardrails you put.
And they can get you for theft, etc, if you do. Sometimes the social and legal controls are far more effective.
And they can get you for theft, etc, if you do. Sometimes the social and legal controls are far more effective.