Needed good website on DES algorithm

[bxbxb3]

Hi,

I am trying to implement DES using VHDL. When I complete 16 rounds of
operation, my output does not match with the practical one. Can anybody
suggest me a good book or a website that illustrates DES with data at
each
round?

Thanks.

 

[Roberto Gallo]

Hi,

I am trying to implement DES using VHDL. When I complete 16 rounds of
operation, my output does not match with the practical one. Can anybody
suggest me a good book or a website that illustrates DES with data at
each
round?

Thanks.

There are many good examples. Check www.opencores.org for a full
implementation or check http://www.aci.net/Kalliste/des.htm for an
illustrated explanation.