Re: ISO/IEC 9797-1 MAC Algorithm 3 how to?
From: Frank Fritze (frank.fritze_at_bdr.de)
Date: 13 Apr 2005 13:41:52 -0700
firstname.lastname@example.org (Frank Fritze) wrote in message news:<email@example.com>...
> I need to calculate the Cryptographic checksum using ISO/IEC 9797-1 MAC
> algorithm 3 with block cipher DES, zero IV (8bytes), and ISO 9797-1
> padding method 2. The MAC length must be 8 bytes.
> Any ideas on how to do it?
> As a sample, the data I am working on now is:
> Data =
> Kmac = '7962D9ECE03D1ACD4C76089DCE131543'
> Resultant MAC[Kmac](Data)='5F1448EEA8AD90A7' (I want to know how to get
> to this value).
In addition to my question:
I've already tried to calculate it over MACTripledes ... but with no success..
And I'm sure, it can be done with .NET, isn't it ?