Intermediate-level overview of how high security locks work, and how to defeat them. Assumes basic lockpicking knowledge and concepts (shear line, tension, etc.), but will include a 2-minute refresher for those who need it. Emphasis will mainly be on high security pin-tumbler locks--ASSA Twin, Medeco Biaxial, Schlage Primus, and similar sidebar locks--with some discussion of disc locks (Abus, Abloy).