Open Sesamee presented at CircleCityCon 2017

by Max Power,

Summary : Resettable combination locks are popular because they can be set to user-chosen codes. Multiple locks can be set alike to one another. Authorized users don’t have to keep track of key or other physical credentials. These locks are often used to control access to construction zones, infrastructure, and sensitive areas (such as utility equipment and cellular towers) across the country. The most popular of these locks is the Master 175. Methods of attacking this lock have been known for some time, however the descriptions and documentation were not readily available. The talk will discuss the best method for decoding this lock and examine the path I took to create my own cutaways and instructional models. In the end, this will hopefully provide people skills both at some home-machining and also help them decode the lock well enough to teach others.