People often sell master keys on ebay and other sites and upload photos of the key. http://www.schneier.com/blog/archives/2012/10/master_keys.html http://www.sc

People often sell master keys on ebay and other sites and upload photos of the key. http://www.schneier.com/blog/archives/2012/10/master_keys.html http://www.schneier.com/blog/archives/2012/10/master_keys.ht...