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发表于 2009-9-2 10:50:15
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Multi2 encryption algorithm questionsFrom: malexgreen (malexgreen_at_hotmail.com)
Date: 07/02/03
Date: 2 Jul 2003 09:10:47 -0700Hi:
I have a couple of questions regarding the MULTI-2 encryption
algorithm:
Based on the ISO standard, the encryption algorithm is described as
working using four individual stages, each of which does
arithmetic/logical operations on the plaintext and datakey [size=1em]64 bits at
a time, with the data key taking the system key ([size=1em]32 bits at a time) to
encrypt the datakey into a working key. Here are my questions:
For the plaintext [size=1em]encryption data path, does the output of pi-1
directly feed into the input of pi-2, and so on and so forth.
Also for the key schedule datapath, does the most significant 4-byte
section of the system key go into pi-2, following by the two next most
significant 4-byte chunks into pi-3, etc, etc. or is it the other way
around? Thanks.
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