as it can allow for systematic randomization, which makes re- verse engineering very difficult.” Basic decoding is simple, but necessary in this format. This next example was provided by Jerome V. Andrews, CML, an- other master keying expert: KBA 3 7 3 6 8 0 2 4 1 3 5 7 9 TMK: Matrix: Schlage; MACS = 7; 0-9; RC Method 0 83 85 87 89 03 05 07 09 23 25 27 29 43 45 47 49 Black boxes indicate MACS violations. Each square represents a bitting, related to the KBA. Draw an imaginary line from the number on the leſt across, and the number on the top down. Where they intersect will be a bitting. 48 KEYNOTES SEPTEMBER 2017 2 4 6 8 0 2 4 6 “List format, standard progression format and matrix format all have their place in the world of master keying. And, each is used in a different way.” This first box in the matrix represents the bitting: 373830 Temporary Conclusion: There’s Even More! This second installment in the master keying series touched on the broad concepts of a few basics and the three progression techniques of progression types, progression methods and pro- gression formats. But, it did not address anything concerning cross keying, the standard key coding system, selective masters, record keeping, designing a TMK and control key, decoding from the TMK, unplanned master key system contingencies, MACS management, multiplex keyways, master keying LFICs and SFICs, master keying master ring cylinders, setting up for a keying conference, expanding an exhausted system and other related topics. In our next wildly exciting installment three, we will venture into the “Eight-Step Program to Designing a Master Key Sys- tem, Leading to Peace and Happiness.” You’ll be taken by the hand and shown exactly what you will need to do to correctly and effectively master key a cylinder to perfection! Now miss- ing that is truly not an option. A heartfelt ‘thank you’ is extended to Billy B. Edwards, CML, Je- rome V. Andrews, CML and John Hubel, CML, ICML, M.Ed, for their assistance in preparing for this series on master keying. William M. Lynk, CML, CPS, ICML, M.Ed., has een a locksmith since 1975 and is the owner of ww.ICLSglobal.com. Bill is an IC specialist, an dustry author, the subject matter expert on IC r ALOA, and an ALOA ACE instructor, teaching classes on interchangeable cores and master keying across the country. He has originated SFIC Technical Manu- als for both national and international lock manufacturers, and maintains a working relationship with the major lock and security manufacturers throughout the world. In 2013 and 2015, he was named Keynotes Author of the Year. WWW.ALOA.ORG
