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Re: Noob dumb question (extending emacs)
From: |
Jean Louis |
Subject: |
Re: Noob dumb question (extending emacs) |
Date: |
Sun, 24 Oct 2021 09:45:43 +0300 |
User-agent: |
Mutt/2.0.7+183 (3d24855) (2021-05-28) |
* Yuri Khan <yuri.v.khan@gmail.com> [2021-10-23 13:47]:
> On Sat, 23 Oct 2021 at 04:35, Jean Louis <bugs@gnu.support> wrote:
>
> > - I have noticed that file "/proc/pressure/io" is constantly
> > changing, could not find temperature stuff now, thus:
>
> “Constantly changing” does not mean it is a reliable source of
> randomness (entropy).
>
> Also, the word “pressure” there does not refer to any physical
> processes. In context, it is a metaphor, referring to the concurrent
> processes in your computer competing for a resource, in this case, the
> input/output system.
>
> Anyway:
>
> $ cat /proc/pressure/io
> some avg10=0.00 avg60=0.00 avg300=0.05 total=313213969
> full avg10=0.00 avg60=0.00 avg300=0.04 total=238002455
>
> $ cat /proc/pressure/io
> some avg10=0.13 avg60=1.09 avg300=1.08 total=318142202
> full avg10=0.13 avg60=0.98 avg300=0.97 total=242407828
>
> What we have here is some constant text that does not contribute to
> randomness in any way, and a few decimal numbers. A single sampling
> gives you 36 digits. 3 decimal digits ≈ 10 bits, so you could estimate
> 120 bits which would be considered a fair amount of entropy.
Congratulation for the analysis, although myself I cannot follow it.
> (Of course you could just replicate what pwgen does, and read from
> /dev/urandom or /dev/random, and directly convert that into characters
> usable in passwords.)
I agree, though I don't need it personally, as no analyst so far has
cracked any of my Emacs Lisp generated passwords.
I will give US $1,000 if you crack any of my passwords in any of
websites I am subscribed within next 2 years. OK?
--
Jean
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- Re: Noob dumb question (extending emacs), (continued)
- Re: Noob dumb question (extending emacs), Yuri Khan, 2021/10/22
- Re: Noob dumb question (extending emacs), Emanuel Berg, 2021/10/22
- Re: Noob dumb question (extending emacs), Jean Louis, 2021/10/22
- Re: Noob dumb question (extending emacs), H. Dieter Wilhelm, 2021/10/22
- Re: Noob dumb question (extending emacs), Yuri Khan, 2021/10/23
- Re: Noob dumb question (extending emacs), Emanuel Berg, 2021/10/23
- Re: Noob dumb question (extending emacs), Yuri Khan, 2021/10/24
- Re: Noob dumb question (extending emacs), Emanuel Berg, 2021/10/24
- Re: Noob dumb question (extending emacs),
Jean Louis <=
- Re: Noob dumb question (extending emacs), Michael Heerdegen, 2021/10/24
- Re: Noob dumb question (extending emacs), Jean Louis, 2021/10/24
- Re: Noob dumb question (extending emacs), Yuri Khan, 2021/10/24
- Re: Noob dumb question (extending emacs), Jean Louis, 2021/10/24
- Re: Noob dumb question (extending emacs), Jean Louis, 2021/10/24
- Re: Noob dumb question (extending emacs), Emanuel Berg, 2021/10/24
- Re: Noob dumb question (extending emacs), Jean Louis, 2021/10/24
- Re: Noob dumb question (extending emacs), Emanuel Berg, 2021/10/22
- Re: Noob dumb question (extending emacs), Emanuel Berg, 2021/10/22
- Re: Noob dumb question (extending emacs), Jean Louis, 2021/10/22