Don Burke wrote:I read here that the masterkey should have one cut that is the shallowest used in the system and one cut that is the deepest in the system?
That is correct.
Don Burke wrote:I understand the shallowest cut - that forces a "rights amplifier" to track down blanks.
What do you mean by this ?
Don Burke wrote:What is the logic behind using the deepest cut?
See XEO comment..
xeo wrote:I don't know but I'd think you'd want the master key bitting to be higher than all other keys so the user can't file down their key to a master key. I think that is a moot point though as if you have that level of skill you can use various other methods for privilege escalation.
CorrectGWiens2001 wrote:It is a good idea to have some bittings higher and some lower on SFIC or LFIC locks...
Its very good idea to have it.
GWiens2001 wrote:...so that someone would have a harder time picking or impressioning it.
Yes and No. It depends if the position/s are constant or not.
Example 1:
Master code would be 527416, and we will progress our CK's in
last 3 positions. Then Yes its harder to pick it, because first 3 positions (527) are constant. Its a bit difficult to go "through" larger pins.
Example 2:
Master code would be 527416, and we will progress our CK's in
first 3 positions. Then No, its easier to pick because you will have more shear lines at the start.
It's also good practice to use odd/even cuts.
jharveee wrote:perhaps lowest cut would allow you to start your keying matrix at 0 and build up from there. Sure I did not explain that well. first change key would be 00000 then next change key could be 00002, 00004 and so no.
Many Locksmiths / Non-locksmiths do it this way. I'm not saying it as a wrong way of doing it, but definitely not the right one.
As one of the "Rules" is to use highest and lowest code/cut if/when possible - in your MK.
So, it this case what would be your Master Key code?