Maurice Tutor

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  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 23 Sep 2017 My Price 3.00

Davies and Price hash code

1. Consider the Davies and Price hash code and assume that DES is used as the encryption algorithm:

Hi = Hi-1  width=E1Mi, Hi-12

then . Use this property to show how a message consisting of blocks can be altered without altering its hash code.

M1, M2, …. , MN Y’ = E(K’, X’)

2. Show that a similar attack will succeed against the scheme proposed in [MEYE88]:

Hi = Mi  width= E(Hi-1,Mi)

Answers

Maurice Tutor
(5)
Status NEW Posted 23 Sep 2017 09:09 AM My Price 3.00

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