Re: $RANDOM not Cryptographically secure pseudorandom number generator

From	Luuk <luuk@invalid.lan>
Newsgroups	gnu.bash.bug
Subject	Re: $RANDOM not Cryptographically secure pseudorandom number generator
Date	2019-01-02 12:01 +0100
Message-ID	<mailman.6692.1546436927.1284.bug-bash@gnu.org> (permalink)
References	(6 earlier) <CA+4vN7yTJRqc=8eCJWQMXu7nZu7ZreLTEp56SC-LTavSVW-d1A@mail.gmail.com> <CAOSMAus5OvX91r-y8K3Bw7e-T1aj9U72+uE64iM346AV+uSwAA@mail.gmail.com> <CA+4vN7wS_PPH60j_gw2t_2kokds0eZxCzgqAydqiNz5=JLTMxw@mail.gmail.com> <8d46616b-7618-be59-3651-1a01bc3bf7e6@case.edu> <mailman.6674.1546392582.1284.bug-bash@gnu.org>

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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

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Re: $RANDOM not Cryptographically secure pseudorandom number generator Ole Tange <tange@gnu.org> - 2019-01-02 02:29 +0100
  Re: $RANDOM not Cryptographically secure pseudorandom number generator Luuk <luuk@invalid.lan> - 2019-01-02 12:01 +0100

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