> | (date; dmesg ; sysctl -X; vmstat -i ) > /dev/random > | > | Just playing it looks like you might get 4 so bits from the > | rtc and clk interupt count alone. > None. Any data that is publically available via userland should not be > used for cryptography. The data from sysctl -X and vmstat -i vary quite a lot with time and would be difficult to guess in their entrieity, even given the their values at some later date. While any piece of data from these commands isn't hard to guess, the idea is to take a few bits of each of them. I don't claim this produces hundreds of bits of entropy, but I'd expect it to produce ten or twenty bits, even if you are given the output of these from some stage shortly in the future. I note from Mark's comments that writing stuff to /dev/random doesn't change /dev/random's notion of how much entropy it has, but does reseed the generator - so what we're talking about here is the entropy of the seed - or how difficult to guess it is. He does mention a very similar way of reseeding to the above: (ps -gauxwww; netstat -an; dmesg; vmstat -c10 1) > /dev/random David. To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
- Re: randomdev entropy gathering is really weak void
- Re: randomdev entropy gathering is really weak Kris Kennaway
- Re: randomdev entropy gathering is really weak Warner Losh
- Re: randomdev entropy gathering is really weak Alexander Langer
- Re: randomdev entropy gathering is really weak Dan Moschuk
- Re: randomdev entropy gathering is really weak Kris Kennaway
- Re: randomdev entropy gathering is really weak Mark Murray
- Re: randomdev entropy gathering is really weak Kris Kennaway
- Re: randomdev entropy gathering is really weak David Malone
- Re: randomdev entropy gathering is really weak Dan Moschuk
- Re: randomdev entropy gathering is really weak David Malone
- Re: randomdev entropy gathering is really weak Jeroen C. van Gelderen
- Re: randomdev entropy gathering is really weak Dan Moschuk
- Re: randomdev entropy gathering is really weak Mark Murray
- Re: randomdev entropy gathering is really weak Maxim Sobolev
- Re: randomdev entropy gathering is really weak Steve Kargl
- Re: randomdev entropy gathering is really weak Mark Murray
- Re: randomdev entropy gathering is really weak Sheldon Hearn
- Re: randomdev entropy gathering is really weak Kurt D. Zeilenga
- Re: randomdev entropy gathering is really weak George Michaelson
- Re: randomdev entropy gathering is really weak Sheldon Hearn