The level of security is very high, they are swept for listening devices regularly, the windows are tinted and insulated in a way to protect from long range telescopes "reading over the President's shoulder" and so that laser or other long range remote vibration microphones can't hear the conversation in the room via glass in the windows. I worked in a SCIF for 2 years in the military and while ours was essentially a very oversize bank vault with no windows and only one way in or out and under 24/7 armed guard, I think many rooms in the WH where there is no general public access and only carefully screened visitors are allowed would more than qualify. We did lock all Secret and above classified docs in combination safe like filing cabinets at the end of each day. All that said, when we left for the day that armed guard searched us and our briefcases and nothing with a classification marking above Confidential was allowed out. Unless there were clear orders, appropriate guard/escort and a locked secure briefcase, documents lived and died in the SCIF. Classified docs no longer needed were shredded and placed in burn bags which were escorted under guard to a burn facility and certified destroyed. There was no accounting though for classified docs, no inventory. Unless someone went looking for something and just couldn't find it, we would have had no way of knowing day to day if something was missing. In the case of a President and senior staff I can't quite see the Marine guards being quite as nosy as our MPs were.