Any cool XOR tricks?

Question

Looking forward to see some cool XOR tricks. May be using other bit-wise operators also.

Answer 1

swap(a,b)

  a = a xor b
  b = a xor b
  a = a xor b

a and b will now be swapped

Nice info on bitwise operations

Answer 2

Easy and efficient encryption: encrypted_text = text ^ long_secret.
Repeat 256 times for security. :-)