The inverse is XOR!
If you have:
c = a^b;
You can get a
or b
back if you have the other value available:
a = c^b; // or b^c (order is not important) b = c^a; // or a^c
For example if a = 5
, b = 3
(and thus c = 6
as you mentioned) you get:
b=0011 (3) a=0101 (5) c=0110 (6) XOR or c=0110 (6) XOR ---------- ---------- a=0101 (5) b=0011 (3)
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