[IP] Master Key Copying Revealed (Matt Blaze of ATT Labs)

[Matt Blaze]

Actually even in their Biaxial design the sidebar hole is always on the
bottom pin, and so the master shares the angle with the change keys.

-matt

> There is, however, a newer medeco design that uses a drill-hole
> instead of a groove.  With that design you can have the pin twist be
> different at different pin-heights (by putting the drill-hole at a
> different twist-angle).  I don't think this attack would work quite
> as easily on this design.
> 
> -derek


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