bug-bash
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: $RANDOM not Cryptographically secure pseudorandom number generator


From: Luuk
Subject: Re: $RANDOM not Cryptographically secure pseudorandom number generator
Date: Wed, 2 Jan 2019 12:01:45 +0100
User-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0

On 2-1-2019 02:29, Ole Tange wrote:
On Mon, Dec 31, 2018 at 8:12 PM Chet Ramey <chet.ramey@case.edu> wrote:
:
Thanks for the patch. I'll take a look after I release bash-5.0. One
question: can you reproduce the same random sequence by using the same
seed? That's for backwards compatibility, even if the sequences themselves
differ.

Yes. Seeding with a value will give the same sequence:

$ RANDOM=4; echo $RANDOM $RANDOM
21584 22135

$ RANDOM=4; echo $RANDOM $RANDOM
21584 22135


But not across systems:
luuk@WINDOWS:/mnt/c/Windows/System32$ RANDOM=4;echo $RANDOM $RANDOM
1692 27588
luuk@WINDOWS:/mnt/c/Windows/System32$ RANDOM=4;echo $RANDOM $RANDOM
1692 27588

luuk@opensuse:~> RANDOM=4; echo $RANDOM $RANDOM
32221 21043
luuk@opensuse:~> RANDOM=4; echo $RANDOM $RANDOM
32221 21043



reply via email to

[Prev in Thread] Current Thread [Next in Thread]