nanog mailing list archives
Re: best way to create entropy?
From: Jonathan Lassoff <jof () thejof com>
Date: Thu, 11 Oct 2012 17:25:37 -0700
On Thu, Oct 11, 2012 at 5:20 PM, Jimmy Hess <mysidia () gmail com> wrote:
On 10/11/12, 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 areYou are referring to the entropy pool used for /dev/random and crypto operations ? You could setup a video capture card or radio tuner card, tune it into a good noise source, and arrange for the bit stream to get written to /dev/random
Yes, but then you're also introducing a way for an external attacker to transmit data that can be mixed into your entropy pool. While certainly a cool hack, I don't think anything like this would be safe for cryptographic use. </two cents> Cheers, jof
Current thread:
- Re: best way to create entropy?, (continued)
- 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? Dan White (Oct 11)
- Re: best way to create entropy? shawn wilson (Oct 11)
- Re: best way to create entropy? Andy Smith (Oct 12)
- Re: best way to create entropy? Jonathan Lassoff (Oct 11)
- Re: best way to create entropy? Jussi Peltola (Oct 11)
- Re: best way to create entropy? shawn wilson (Oct 11)
- Re: best way to create entropy? Jimmy Hess (Oct 11)
- Re: best way to create entropy? Valdis . Kletnieks (Oct 11)
- Re: best way to create entropy? Jimmy Hess (Oct 16)
- Re: best way to create entropy? JC Dill (Oct 18)