Sub Swap (Var1, Var2) Var1 = Var1 Xor Var2 Var2 = Var2 Xor Var1 Var1 = Var1 Xor Var2 End Sub
See: Xor swap algorithm
... bypass the limitations the DVD Consortium sought to impose. The cryptographic keys themselves have been discovered and widely disseminated (see DeCSS). See Professor ...