nanog mailing list archives
Re: best way to create entropy?
From: shawn wilson <ag4ve.us () gmail com>
Date: Fri, 12 Oct 2012 01:04:49 +0000
On Fri, Oct 12, 2012 at 12:49 AM, Robert M. Enger <NANOG () enger us> wrote:
On 10/11/2012 5:08 PM, Jonathan Lassoff wrote:On Thu, Oct 11, 2012 at 5:01 PM, shawn wilson <ag4ve.us () gmail com> 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: http://www.entropykey.co.uk/ 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, jofIntel claims to include a hardware Digital Random Number Generator (DRNG) in its later generation chips. Is their offering inadequate/discredited? http://en.wikipedia.org/wiki/RdRand http://www.pcmag.com/article2/0,2817,2391367,00.asp http://www.intel.com/p/en_US/embedded/innovation/security/walker-article-security http://software.intel.com/en-us/articles/intel-digital-random-number-generator-drng-software-implementation-guide/
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.
Current thread:
- best way to create entropy? shawn wilson (Oct 11)
- Re: best way to create entropy? Jonathan Lassoff (Oct 11)
- Re: best way to create entropy? Robert M. Enger (Oct 11)
- Re: best way to create entropy? shawn wilson (Oct 11)
- Re: best way to create entropy? Mark Andrews (Oct 11)
- Re: best way to create entropy? Dan White (Oct 11)
- RE: best way to create entropy? Naslund, Steve (Oct 11)
- Re: best way to create entropy? Jasper Wallace (Oct 13)
- Re: best way to create entropy? shawn wilson (Oct 13)
- Re: best way to create entropy? Sander Steffann (Oct 14)
- Re: best way to create entropy? Aaron Toponce (Oct 16)
- Re: best way to create entropy? Robert M. Enger (Oct 11)
- Re: best way to create entropy? Jonathan Lassoff (Oct 11)
- Re: best way to create entropy? shawn wilson (Oct 11)
- Re: best way to create entropy? Andy Smith (Oct 12)