[OLPC Security] Securing the laptop: DoS

Simson Garfinkel simsong at acm.org
Sun Oct 8 09:08:17 EDT 2006


On Oct 8, 2006, at 12:48 AM, Ivan Krstić wrote:

> John Moser wrote:
>> ^^^ This is probably the easiest to handle.  Just buffer and delay
>> writes for a good 30-45 seconds, merging the changes in memory and  
>> then
>> snapshotting and writing back to disk.
>
> The way I'm hoping to mitigate the NAND burn problem is by a  
> combination
> of rate limiting and hard write quotas.
>
> Simson Garfinkel:
>> Hell, use a PNG so that the system can't tell the difference.
>
> I think John was confused since pseudo-random number generators are
> almost universally abbreviated as PRNGs, with PNG sometimes  
> standing for
> pseudo-random noise generators.

Ah. You're right. It was late.

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