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LINUX-L  2007

LINUX-L 2007

Subject:

Re: Better way to do it:

From:

Shawn McMahon <[log in to unmask]>

Reply-To:

Platform Independent Linux List! <[log in to unmask]>

Date:

Fri, 31 Aug 2007 12:03:27 -0400

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (22 lines)

On Thu, 2007-08-30 at 17:12 -0400, Bob Johnson wrote:
>
> But an audio CD will run out of data before you fill a 1GB file. Region 
> encoding tries to get in the way with a DVD.
> 
> For repeated use, I would be inclined to create a DVD full of data from 
> urandom, then use dd to pull data off of it with various offsets to create 
> test files. Or you could copy a few music CDs to one big file that you burn 
> to your DVD to create a collection of semi-random data for test files.

I would shake my head ruefully and how you guys are overthinking this,
and just use /dev/urandom, because that's what it's there for and it's
not like /dev/random stores infinite entropy forever if you just leave
it alone.

The default size of /dev/random's entropy pool is 512 bytes.  It doesn't
take long to renew that.  Unless you're doing constant ultra-secure
cryptography like streaming intelligence intercepts or something, you
really shouldn't concern yourself with the effects of
pulling /dev/urandom to your heart's content.  I guarantee you, there
are few purposes short of a one-time-pad generation where a gig
of /dev/urandom won't be statistically indistinguishable from random.

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