I bought this product to be able to lock up my medication when I travel.  Believe it or not in previous air travel, my medications were stolen as they were in clear plastic bags.  If Homeland Security needed to open this product, they would have to ask me for the key.  No one stole my meds this time and no one asked me for the key.  There is a chance that they could steal the entire envelope however that was not the case.  It also protected my granddaughter from getting into my medication when I visited her as she is a toddler.  The lock works great and I would recommend this product to anyone who travels.