Re: ISO/IEC 9797-1 MAC Algorithm 3 how to?
From: Valery Pryamikov (valery_at_harper.no)
Date: Thu, 14 Apr 2005 07:22:38 +0200
Did you see my post where I answered you how to do it? It could be done with
.Net if you simply follow my perscription. and right - MACTripleDES is a
"Frank Fritze" <firstname.lastname@example.org> wrote in message
> email@example.com (Frank Fritze) wrote in message
>> 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
> And I'm sure, it can be done with .NET, isn't it ?