Techniques are disclosed for sensitive information leak prevention using electromagnetic rays to prevent image capture of sensitive information. An example methodology implementing the techniques includes rendering a presentation slide on a display device, identifying at least one portion of the rendered presentation slide that contains sensitive information, and determining a location of the identified at least one portion on the rendered presentation slide. The method also includes triggering at least one electromagnetic emitter to emit an electromagnetic signal within the location of the identified at least one portion of the rendered presentation slide. The emitted electromagnetic signal inhibits image capture of the sensitive information by an image capture device.