A couple of years ago one of our members, Jos Weyers, came up with a novel method to attack masterkeysystems. If you know Jos, it’s probably not at all surprising that this method mainly consists of impressioning. Attacking masterkeyed systems that way has several distinct advantages; no need to take a lock apart, no need for huge numbers of blanks, no need to have access to a working key, no guessing if your new key is indeed the master you are looking for, to name just a few. After keeping this knowledge within a rather small community for some time, it is now out in the open due to a talk Jos did at OzSecCon in Melbourne this year.Which off course includes live demo’s right there on stage.
https://twitter.com/kylieengineer/status/1139694231964938240
(masterkeysystem supplied and pinned up by Holly Poer , “southpark-esque lock animations” by JanWillem Markus)