Hi Michael,

Regarding the XOR, there is a VBA function XOR, but one appears not to have
been implemented as standard in the worksheet functions.
One possibility (?) if not using VBA might be to implement one as e.g. :

=AND(NOT(AND(A1,B1)),OR(A1,B1))

HTH
Anthony

"Michael P" wrote:

I am after a function or module that I can use or import into an Excel
spreadsheet to support DES encrypt/decrypt calculations?
Also, I aslo need to support XOR as well!
Thanks