Re: RSA's SecurPC not-so-"Secur"

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geeman@best.com
Sat, 16 May 1998 21:16:28 -0700


At 01:53 PM 5/17/98, Peter Gutmann wrote:
>>OTOH, [Windows 95 only] if (starting at the W95 desktop) you right click "My
>>computer" and then, in succession, click Properties, Performance, Virtual
>>Memory, and choose to set the virtual memory to 0 (specifically allowed as
>>noted in the Help for that window), then and only then, could you say that
>>swapping does not occur. Cautions: (1) reboot required before and after,
(2)
>>you will need a lot of real memory installed. How much memory? That
might be
>>an example on an unshared secret. <g>
>
>One caveat when doing this: I don't know about Win95, but under 3.1
turning off
>swapping would cause Windows to crash when you ran low on memory or when
you'd
>left it running for awhile (anything from a few days to a week, I can't
>remember the exact timing). Creating a small RAM drive and allocating a
token
>swapfile (say, a few hundred K) on it fixes this.

Well, this won't work on 95 - you'll crap out because of paging a LOT
sooner on 95 than 3.?
Creating a RAMDISK requires loading some real-mode memory manager crap
unless you want to eat all the global lower 1meg - even then you're just
plain going to need a more substantial pagefile. Remember that all
executable and .DLL data segments are memory mapped with pagefile backing
store. So then to get a reasonably size swap, you have to load emm385 and
himem from config.sys, then Win95 starts acting pretty strange; I don't
remember exactly what happened, but it got pretty broken for some of the
things I wanted to do.

>
>Peter.
>
>
>


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The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:17:26 ADT