[asterisk-dev] AstriDevCon Recap - IAX2 RENEW for encryption

Kevin P. Fleming kpfleming at digium.com
Fri Jun 1 08:58:03 MST 2007

Paul Hewlett wrote:

> Have you considered adding SA_SAMPLE_RANDOM to the arguments of the 
> request_irq() call in the drivers ? This would add the zaptel drivers to list 
> of devices that contribute to the entropy pool and theoretically at least 
> increase security. Or are the interrupts generated by zaptel devices too 
> regular or unsuitable for this purpose ?

They are *completely* regular, 1000 times per second per card. Not a
good entropy source at all :-)

Kevin P. Fleming
Director of Software Technologies
Digium, Inc. - "The Genuine Asterisk Experience" (TM)

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