Let's suppose we have a suitcase containing some RFID tagged objects. With a reader contained in the same box, I periodically poll the content in order to check if something is removed from the suitcase. Removed means at a distance, lets'say, >1 m. Is that strategy possible with RFID?
Any idea on how to achive that otherwise?
Problem is we have to indentify precisely a set of items contained in the suitcase, and understand when one of these is removed from the case, even by is id, then returned. 

**EDIT**
I'm a programmer, not an electronic engineer so I'm definitely ignorant. If there is some obvious solution to track items in a suit case, in term on when a specific item is extracted (  not stolen, so not gone at undefinitely far distance ) , any idea are welcome. Solution based on RF signal based seems IMHO a little too weak, but if you say it will work, I will try.
Maybe some matrix of NFC receiver would work? Is there some solution I can buy for try?
Surprisingly my googling on the topic did not produce satisfying results.