best way to create entropy?

shawn wilson at
Fri Oct 12 01:04:49 UTC 2012

On Fri, Oct 12, 2012 at 12:49 AM, Robert M. Enger <NANOG at> wrote:
> On 10/11/2012 5:08 PM, Jonathan Lassoff wrote:
>> On Thu, Oct 11, 2012 at 5:01 PM, shawn wilson < at> wrote:
>>> in the past, i've done many different things to create entropy -
>>> encode videos, watch youtube, tcpdump -vvv > /dev/null, compiled a
>>> kernel. but, what is best? just whatever gets your cpu to peak or are
>>> some tasks better than others?
>> Personally, I've used and recommend this USB stick:
>> Internally, it uses diodes that are reverse-biased just ever so close
>> to the breakdown voltage such that they randomly flip state back and
>> forth.
>> Cheers,
>> jof
> Intel claims to include a hardware Digital Random Number Generator (DRNG) in
> its later generation chips.  Is their offering inadequate/discredited?

that's good to know about. i'll have to remember it when tech moves
along in a year or so. but, right now, i don't think i have that
capability. also, i'd prefer to have a chip agnostic solution as a
month or so ago, i wanted to create a key on a raspberry pi (should've
just copied one over) and it took forever to generate enough entropy -
even as i was compiling stuff. after that, i considered tcpdump.

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