[RC5] WinCE / ARM Client

[Décio Luiz Gazzoni Filho]

On Jun 22, 2006, at 1:16 PM, Benjamin Kaufman wrote:

> On 22-Jun-2006, D?cio Luiz Gazzoni Filho wrote:
>>
>> On Jun 22, 2006, at 12:53 PM, Emerson Gomes wrote:
>>
>>> Well there are several outlet powered WinCE devices (Dreamcast  
>>> for an
>>> example), but at night my palmtop and his outlet are idle, so it
>>> wouldn't get on the way of normal use anyway.
>>>
>>> I really would appreciate any help on grabbing the full source code
>>> somewhere and made it avaliable to the WinCE/ARM plataform  
>>> (There's a
>>> Linux/ARM client anyway).
>>
>> Why don't you do a little RC5-72 hand computation when your brain is
>> idle too? It would help the project about as much as your palmtop  
>> would.
>>
>> D?cio
>>
>
> That is not really true any more. Some of the handhelds are up to 450
> and 500MHz, faster than PCs when dnet started.

The comparison is not really valid. I'd take a superscalar, OOO  
processor with branch prediction like the P2 any day over a similarly  
clocked ARM, probably even over an ARM with twice the clock. As a  
matter of fact, I'd say the OP is better off unearthing an old  
Pentium 200 from the closet and keeping it running all day, than  
bothering with his ARM during the night.

Anyway, d.net started cracking 56-bit keys, and indeed a present-day  
ARM would have been a formidable contribution back then. Now that  
they're tackling 72-bit keys (that's 16 bits longer, meaning 65536  
times the work, plus a safety factor for algorithmic differences), an  
ARM is next to useless. Nothing against the architecture, I love it  
actually, but currently available cores are meant for low-power, not  
high-performance, computation.

Décio

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