nanog mailing list archives
Re: best way to create entropy?
From: Jussi Peltola <pelzi () pelzi net>
Date: Fri, 12 Oct 2012 03:43:35 +0300
On Thu, Oct 11, 2012 at 05:25:37PM -0700, Jonathan Lassoff wrote:
Yes, but then you're also introducing a way for an external attacker to transmit data that can be mixed into your entropy pool.
XORring predictable data to random data does not yield a predictable result. /dev/random is world writable so if writing to it causes the random generator to output something predictable it's a bug that needs to be fixed. Also, an analog TV receiver will always have some noise that is not predictable even if you are transmitting a known signal to it. If you seriously need good entropy for cryptography, I think you will not ask about it on nanog, and I'd be very wary of cheap hardware RNGs too.
Current thread:
- RE: best way to create entropy?, (continued)
- 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? 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)