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How is Parity Bit Calculation for 3DES 1K - 2K - 3K?

848921Mar 22 2011 — edited Mar 23 2011
Hi masters..

I'm not familiar with 3DES.
As far as i know there're 3 kinds of DES / 3DES(which is distinguished by its key length), namely 1Key, 2Keys, and 3Keys.
And DES/3DES uses Parity Bit..
Sorry.. I don't know how to compute the Parity Bit..

I got application from my friend.. And there's a Parity Bit Calculation..
I'm just curious how Parity Bit calculation works..

Here's some Input and Output :

Input 1 (1K) : 0345457345342534
Output : 0245457345342534

Input 2 (2Ks) : CABF326FA56734324FFCCABCDEFA
Output : CBBF326EA46734324FFDCBBCDFFB

Input 3 (3Ks) : AAAAAAAAAAAAAAAABBBBBBBBBBBBBBBBCCCCCCCCCCCCCCCC
Output : ABABABABABABABABBABABABABABABABACDCDCDCDCDCDCDCD

Please tell me how is the calculation exactly..

Thanks
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Locked on Apr 20 2011
Added on Mar 22 2011
#cryptography
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