Re: DES Key Decryption Time

From: Valdis.Kletnieksat_private
Date: Wed Apr 09 2003 - 11:55:15 PDT

  • Next message: Slawek: "Re: DES Key Decryption Time"

    On Wed, 09 Apr 2003 20:45:47 +0200, Slawek said:
    
    > In hardware you can unroll the loop and use pipelining giving even 1 cycle
    > per 1 block of data (not to mark about paralel processing which is easy with
    > today's FPGAs).
    
    Well.. one externally visible cycle - if you unroll the loop you need to either
    have 16 cascading stages that use async logic or timing signals to keep all the
    bits in sync. ;)
    
    I wonder how many clock cycles it would take using a 2901 bitslice (anybody
    remember those? ;)
    
    
    
    



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