Re: Locking Page in Memory

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#4150

From: Eelke
Date: Fri, 10 Mar 2006 07:35

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prunesquallor wrote:

> Well, I guess it depends on the circumstances. If a key has been swapped out 
> to the swap file, then it could still be there hours, days or even weeks - 
> until that bit of the swap file gets overwritten. So that key is 
> recoverable. Whereas a key in memory expires the next time the machine's 
> off.
> 

I had an idea that might work. The details I leave as an exercise.

If you would use a memory mapped file the block of memory would never be 
written to the swapfile. Instead windows would swap it to the file. If 
you make sure you have the file open with exclusive access (no sharing) 
to the file nobody else could get access to the contents and you could 
zero it out when you no longer needed it.

Regards,

Eelke

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