Re: Persisting /dev/random state across reboots

2010-07-30 Thread Thomas
Am Donnerstag 29 Juli 2010, 21:47:01 schrieb Richard Salz: > At shutdown, a process copies /dev/random to /var/random-seed which is > used on reboots. > Is this a good, bad, or "shrug, whatever" idea? > I suppose the idea is that "all startup procs look the same" ? Indeed. The boot process of a ma

Re: Persisting /dev/random state across reboots

2010-07-29 Thread John Denker
On 07/29/2010 12:47 PM, Richard Salz wrote: > At shutdown, a process copies /dev/random to /var/random-seed which is > used on reboots. [1] Actually it typically copies from /dev/urandom not /dev/random, but we agree, the basic idea is to save a seed for use at the next boot-up. > Is this a go

Re: Persisting /dev/random state across reboots

2010-07-29 Thread Paul Wouters
On Thu, 29 Jul 2010, Richard Salz wrote: At shutdown, a process copies /dev/random to /var/random-seed which is used on reboots. Is this a good, bad, or "shrug, whatever" idea? I suppose the idea is that "all startup procs look the same" ? "better then not". A lot of (pseudo)random comes from

Re: Persisting /dev/random state across reboots

2010-07-29 Thread Nicolas Williams
On Thu, Jul 29, 2010 at 03:47:01PM -0400, Richard Salz wrote: > At shutdown, a process copies /dev/random to /var/random-seed which is > used on reboots. > Is this a good, bad, or "shrug, whatever" idea? If the entropy pool has other, reasonable/fast sources of entropy at boot time, then seeding

Re: Persisting /dev/random state across reboots

2010-07-29 Thread Thierry Moreau
Richard Salz wrote: At shutdown, a process copies /dev/random to /var/random-seed which is used on reboots. Is this a good, bad, or "shrug, whatever" idea? I suppose the idea is that "all startup procs look the same" ? tnx. First look at http://en.wikipedia.org/wiki/Urandom There is a tremen

Persisting /dev/random state across reboots

2010-07-29 Thread Richard Salz
At shutdown, a process copies /dev/random to /var/random-seed which is used on reboots. Is this a good, bad, or "shrug, whatever" idea? I suppose the idea is that "all startup procs look the same" ? tnx. -- STSM, WebSphere Appliance Architect https://www.ibm.com/developerworks/mydeveloperworks/b