[RC5] rc5->des keyrate/blocksize/time ->weirdness
msissom at dnaent.com
Thu Jan 15 10:27:28 EST 1998
The combination of these things does not compute.
The des benchmark says the box is going through keys
at nearly twice the rate of rc5.
The rates reported by the client while operating are
nearly twice the rates reported on rc5.
rc5 = >600Kks
des = >1Mks
The des block size was set at 2^28 from the start for
The time required to complete a 2^28 des block should be
about 1/2 the time required for an rc5 block.
It is not. It is roughly equal to the time/block of rc5.
rc5 = >7min/block
des = >8min/block
The number of blocks per day should be about twice that
It is not. It is roughly equal to the blocks/day of rc5.
Is the block size selected/real off by a factor of two?
Do the benchmark/timing routines only count every other
key? Am I really going ~4x as fast on blocks that are really
~4x as big, but only counting half of the keys?
Marc Sissom http://www.dnaent.com
Design Engineer voice: 972/644-3301
DNA Enterprises, Inc. fax: 972/644-6338
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