[Fwd: Re: [Fwd: [HARDWARE] Just Courious......]]

Dave Avery daa at rmi.net
Sun Sep 19 00:16:28 EDT 1999


On Sat, 18 Sep 1999 13:09:08 -0500, Robert Norton wrote:

>"William J [on the road] Halverson" wrote:
>
>> There is a minimum charge that shippers will ship at; handling an one item order
>> worth $30 costs as much as handling a one item order worth $300.
>>
>> So the group may want to consider - is it easier to sell 750 @ $300, or 7,500 @
>> $30?  The answer may surprise you .... we are just talking about recovering  costs
>> here ... you can imagine the guy who puts in 4 man months of his time will have
>> more 'at risk' if we have to sell 7,500 than 750...
>>
>> So suppose:  we want to make a go/no go decision on this in two months.  So we
>> have to find the designer [probably done], we have to get a bank account to escrow
>> the money [no I don't take personal checks or cash ;-) ], and we have to publicize
>> this and get the funds together to make it a reality.
>>
>> People in on this should be serious and feel safe:  they should not be expected to
>> send somebody a check; nor should the developer be expected to put 4 months into
>> it on a 'wing and a prayer'.
>>
>> Does the group think this is reasonable?
>>
>> Any suggestions on a trusted entity/persons to supervise this thing?  [Hmmm...
>> would Tim LB get excited about this maybe?]
>
>I think 1000 units at $100 with $20 "profit" per unit would leave $20,000 for
>developement costs.  I feel it should be pretty easy to sell 1000 at that price,
>especially since a fully unrolled algorithm in an FPGA would crack one code per tick.
>That would be 25Mcrack/sec even with the slowest parts!  Also worth considering, with
>a fully unrolled algorithm, you don't need any barrel shifting, it is just static
>wiring from latch to latch. (Output #2 goes to input #3 of the next stage, and so on.)
>That should cut the gate count a bit.

as far as I can tell you do require a programmable barrelshifter - the rotates are
data dependant , unlike DES . The amount to rotate is determined by the incoming
data/key

dave
PGP Public Key Fingerprint= 90DF A29F 679F A452 7198  BECC 1616 0283 2D13 7AC2


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