(not my combinatorics, but as I understand them, correct)īackground: I have designed Masterkey systems for over thirty years. With what I understand to be good practice it’s only about 125K “good” key bitings on a 6 pin, 9 depth, MACS7 lock. It includes keys that pinned with the same depth throughout, and other undesirable pinnings. That’s not desirable keys, just total possible combinations. If the lock is pinned per mfg recommendations. Unless Schlage MACS has changed, a 6 pin has about 750K combinations not 1 million. Only in a non interchangeable core system does a master keyed system become easier to pick, as you have 2 opportunities to pick each pin, but I can’t think of the last time I saw a non IC master keyed system in “the wild”. Realistically any attacker sophisticated enough to learn to pick well enough to compromise a 6/7 pin core in a useful amount of time is going to use an easier exploit. Simply having more authorized users for any lock is a much bigger threat in high security applications. There are other key duplication exploits available that don’t require prior access to a lock or even close physical access to the key. Master keyed system are vulnerable to rights escalation attacks by authorized users, but that’s not picking- it’s an internal security threat requiring an operational key, and an exploit that’s functionally moot. If the control sleeve is up to date, it becomes much harder to pick than a non master keyed system. Control of one shear line is possible, but requires non-“standard” lockpicking equipment, and not an up to date lock design. Master keying in a IC system is more difficult to pick as there are 2 possible shear lines, and all pins must be picked to the same shearline to open or remove the lock. Sure, the dialogue starting around 2:05~3:00 has a few problems. If newer control sleeve design is used, they become much harder to pick.Ī traditional core is easier to pick when master keyed, but that installation is much rarer. In most commercial applications, interchangeable cores are used, which dramatically increases picking difficulty, as the addition of a secondary shear line at the control sleeve requires specialized tension tools to pick, if the control sleeve doesn’t have up to date security features. (note, locksport as a community is quite serious about ethical security research and ethical use of knowledge to increase security and security awareness, despite a decent amount of push back from trading locksmiths and lock manufacturers mostly where they pushing security through obscurity) Locksport organizations such as TOOOL and LSI offer a lot of great resources for understanding how locks work, and Allegion does a lot of really great education, but there’s misinformation in this video. You need to login or register to bookmark/favorite this content.īackground: I work in architecture, frequently specifying hardware, and for fun have been hobby lockpicking/studying physical security for about 20 years. What other topics would you like to see addressed in future videos? The rest of our whiteboard animation videos can be found on the Allegion Training page, or on the Videos page of. So we made a whiteboard animation video to help explain some of the common terms. I admit (despite my immediate love of keying)…keying terminology can be confusing. One day one of my coworkers (Hey Don!) taught me how to shim a cylinder, and I was a natural! I shimmed my first cylinder while answering a code question on the phone. I love master keying! I’m sure I drove our locksmith crazy (Hi Louise!), asking if I could help in the shop. She had researched it, and described how the pins go into the cuts on the key, and of course I had to supplement her education with TMI about shear lines, master pins, bitting lists, etc. Last night, my oldest daughter told me that her science assignment was to explain how inclined planes are used in keys.
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