Messages in this thread | | | Date | Sat, 08 Dec 2007 11:33:57 -0600 | From | Mike McGrath <> | Subject | Re: Why does reading from /dev/urandom deplete entropy so much? |
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Theodore Tso wrote: > On Sat, Dec 08, 2007 at 02:37:57AM -0500, Jon Masters wrote: > >>> BTW, You may be better off using "uuidgen -t" to generate the UUID in >>> the smolt RPM, since that will use 12 bits of randomness from >>> /dev/random, plus the MAC, address and timestamp. So even if there is >>> zero randomness in /dev/random, and the time is January 1, 1970, at >>> least the MAC will contribute some uniqueness to the UUID. >>> >> I haven't checked how uuidgen uses the MAC, but I would suggest that >> that is not something Fedora should jump at doing - although it would >> help ensure unique UUIDs, it also contributes to the tinfoil hat >> responses that usually come up with things like smolt. >> > > Huh? What's the concern? All you are submitting is a list of > hardware devices in your system. That's hardly anything sensitive.... >
We actually had a very vocal minority about all of that which ended up putting us in the unfortunate position of generating a random UUID instead of using a hardware UUID from hal :-/
-Mike
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