[glorgau]

I write my pins on the back of my debit cards in binary with a bit shift. It helps keep me centered.

[ImJustAnotherOkie]

Why not Exclusive OR with your birth date.

[CodeToad]

“I write my pins on the back of my debit cards in binary with a bit shift. It helps keep me centered.”

Funny thing, I do it too! I’ll shift maybe three bits then flip the first. Simple to undo.