Re: Why does reading from /dev/urandom deplete entropy so much? | KernelTrap

Re: Why does reading from /dev/urandom deplete entropy so much?

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From: Alan Cox

Subject: Re: Why does reading from /dev/urandom deplete entropy so much?

Date: Tuesday, December 4, 2007 - 9:47 am

> No matter what you consider as being better, changing a 12 years old and 
quoted text> widely used userspace interface like /dev/urandom is simply not an 
> option.

Fixing it to be more efficient in its use of entropy and also fixing the
fact its not actually a good random number source would be worth looking
at however.
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Messages in current thread:

Why does reading from /dev/urandom deplete entropy so much?, Marc Haber, (Tue Dec 4, 4:41 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Eric Dumazet, (Tue Dec 4, 7:16 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Adrian Bunk, (Tue Dec 4, 9:18 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Alan Cox, (Tue Dec 4, 9:47 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Ray Lee, (Tue Dec 4, 9:54 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Alan Cox, (Tue Dec 4, 9:55 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Matt Mackall, (Tue Dec 4, 11:01 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Eric Dumazet, (Tue Dec 4, 11:17 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Theodore Tso, (Tue Dec 4, 12:50 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Matt Mackall, (Tue Dec 4, 1:36 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Alan Cox, (Tue Dec 4, 1:40 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Mike McGrath, (Tue Dec 4, 1:48 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Matt Mackall, (Tue Dec 4, 2:08 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Mike McGrath, (Tue Dec 4, 2:18 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Theodore Tso, (Tue Dec 4, 3:03 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Mike McGrath, (Tue Dec 4, 3:12 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Mike McGrath, (Tue Dec 4, 3:23 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Matt Mackall, (Tue Dec 4, 3:33 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Marc Haber, (Wed Dec 5, 5:23 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Marc Haber, (Wed Dec 5, 5:29 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Theodore Tso, (Wed Dec 5, 6:33 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Mike McGrath, (Wed Dec 5, 7:26 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Theodore Tso, (Wed Dec 5, 7:49 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Marc Haber, (Wed Dec 5, 8:10 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Matt Mackall, (Wed Dec 5, 2:26 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Eric Dumazet, (Thu Dec 6, 12:02 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Matt Mackall, (Thu Dec 6, 9:09 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Bill Davidsen, (Thu Dec 6, 12:32 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Bill Davidsen, (Thu Dec 6, 1:08 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Mike McGrath, (Sat Dec 8, 10:33 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Matt Mackall, (Sat Dec 8, 10:43 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Jon Masters, (Sat Dec 8, 10:45 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Jon Masters, (Sat Dec 8, 10:47 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Jon Masters, (Sat Dec 8, 10:54 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Theodore Tso, (Sat Dec 8, 11:05 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Matt Mackall, (Sat Dec 8, 11:15 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Jeff Garzik, (Sat Dec 8, 11:31 am)

Re: entropy gathering (was Re: Why does reading from /dev/ ..., Matt Mackall, (Sat Dec 8, 12:53 pm)

Re: entropy gathering (was Re: Why does reading from /dev/ ..., Jeff Garzik, (Sat Dec 8, 1:04 pm)

Re: entropy gathering (was Re: Why does reading from /dev/ ..., Matt Mackall, (Sat Dec 8, 1:19 pm)

RE: Why does reading from /dev/urandom deplete entropy so ..., David Schwartz, (Sat Dec 8, 1:26 pm)

Re: entropy gathering (was Re: Why does reading from /dev/ ..., Theodore Tso, (Sat Dec 8, 1:31 pm)

Re: entropy gathering (was Re: Why does reading from /dev/ ..., Willy Tarreau, (Sat Dec 8, 1:42 pm)

Re: entropy gathering (was Re: Why does reading from /dev/ ..., Jeff Garzik, (Sat Dec 8, 1:47 pm)

Re: entropy gathering (was Re: Why does reading from /dev/ ..., Willy Tarreau, (Sat Dec 8, 2:07 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Adrian Bunk, (Sat Dec 8, 3:03 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Ismail , (Sat Dec 8, 3:10 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Theodore Tso, (Sat Dec 8, 4:46 pm)

Re: entropy gathering (was Re: Why does reading from /dev/ ..., Theodore Tso, (Sat Dec 8, 4:47 pm)

Re: entropy gathering (was Re: Why does reading from /dev/ ..., Jon Masters, (Sat Dec 8, 6:07 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Willy Tarreau, (Sat Dec 8, 10:21 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Ismail , (Sat Dec 8, 11:21 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Jon Masters, (Sat Dec 8, 11:52 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Theodore Tso, (Sun Dec 9, 5:31 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Matt Mackall, (Sun Dec 9, 9:16 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Pavel Machek, (Mon Dec 10, 9:37 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Matt Mackall, (Mon Dec 10, 4:35 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Theodore Tso, (Mon Dec 10, 6:34 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Bill Davidsen, (Tue Dec 11, 8:42 am)

Re: Why does reading from /dev/urandom deplete entropy so ..., Phillip Susi, (Tue Dec 11, 12:46 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Ray Lee, (Tue Dec 11, 1:02 pm)

RE: Why does reading from /dev/urandom deplete entropy so ..., David Schwartz, (Tue Dec 11, 10:34 pm)

Re: Why does reading from /dev/urandom deplete entropy so ..., Marc Haber, (Thu Dec 20, 3:27 pm)

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