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Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late

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c186282 <c186282@nnada.net> writes:
> On 8/6/25 5:14 PM, Computer Nerd Kev wrote:
>> c186282 <c186282@nnada.net> wrote:
>>>    Note - ALWAYS pre-encrypted before sending to cloud.
>>>    Encrypt local, random name, copy to DBx, Rename
>>>    re-date and whatever else is possible afterwards.
>>>    OpenSSL can do most of the security stuff. I just
>>>    do NOT believe claims of their own 'security'.
>>>    Send 'em binary garbage.
>> Sure, although keep in mind that one day in the future they might be
>> able to decrypt even your old self-encrypted files easily, like
>> encrypted files from the 1990s can be today. Even if they say that
>> data is deleted, there's no way to be sure that someone didn't
>> keep/steal a copy.
>
>   Well, 'relevance' tends to fall off over time.  Ten or twenty year
>   old bank/personnel records and such ... not very interesting.
>
>   Even now I'm sure the spooks can crack AES256 and likely most of the
>   others. Quantum makes that much faster.  Have seen allegedly
>   'quantum-resistant' ciphers, but not sure how well they live up to
>   the label yet. There's also the issue of govts demanding backdoors -
>   ciphers ARE still classed as 'munitions'.

AES-256 (properly implemented and deployed) has stood up to decades of
analysis by a community which has successfully broken multiple other
primitives: RC4, MD5, SHA1, SIKE, FF3. Never say never, but by this
stage, I think the reason AES has not been added to this list is because
there is nothing to find.

As for quantum computers, if AES is the first thing you worry about then
you really do not know what you’re talking about.

A (currently hypothetical) quantum computer of sufficient size would in
principle reduce AES-256 key search to 2^128 time complexity (with a
rather larger constant factor than a classical computer) - far beyond
what human civilization can achieve. Adding more quantum computers
doesn’t help as much as you might imagine since (AIUI) Grover’s
algorithm scales sublinearly.

The algorithms which will be meaningfully vulnerable to nontrivial
quantum computers (at such time as they actually built) are the
classical asymmetric algorithms, based on factorization problems and
various forms of discrete logarithm problem: RSA, (EC)DSA, (EC)DH. The
concern over the relative novelty of their replacements (MLDSA etc)
motivates the widespread (although not universal) preference for hybrids
instead of a pure-PQC solution.

-- 
https://www.greenend.org.uk/rjk/

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Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-07-31 00:26 +0000
  Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late c186282 <c186282@nnada.net> - 2025-07-30 23:02 -0400
  Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late "Carlos E.R." <robin_listas@es.invalid> - 2025-07-31 15:21 +0200
    Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late The Natural Philosopher <tnp@invalid.invalid> - 2025-07-31 14:39 +0100
    Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-08-01 01:08 +0000
      Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late "Carlos E.R." <robin_listas@es.invalid> - 2025-08-01 14:03 +0200
    Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late Marc Haber <mh+usenetspam1118@zugschl.us> - 2025-08-01 10:05 +0200
      Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late "Carlos E.R." <robin_listas@es.invalid> - 2025-08-01 14:04 +0200
        Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late Marc Haber <mh+usenetspam1118@zugschl.us> - 2025-08-01 14:31 +0200
          Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late "Carlos E.R." <robin_listas@es.invalid> - 2025-08-01 14:40 +0200
            Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late Marc Haber <mh+usenetspam1118@zugschl.us> - 2025-08-01 18:16 +0200
          Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late Stéphane CARPENTIER <sc@fiat-linux.fr> - 2025-08-01 19:29 +0000
            Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late c186282 <c186282@nnada.net> - 2025-08-02 02:15 -0400
            Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late Marc Haber <mh+usenetspam1118@zugschl.us> - 2025-08-02 10:05 +0200
          Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-08-01 23:55 +0000
            Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late "Carlos E.R." <robin_listas@es.invalid> - 2025-08-02 03:39 +0200
              Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-08-02 03:24 +0000
                Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late c186282 <c186282@nnada.net> - 2025-08-02 02:04 -0400
                Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late "Carlos E.R." <robin_listas@es.invalid> - 2025-08-02 13:59 +0200
              Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late c186282 <c186282@nnada.net> - 2025-08-02 03:03 -0400
              Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2025-08-05 19:20 +0000
                Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late Nuno Silva <nunojsilva@invalid.invalid> - 2025-08-05 23:04 +0100
                Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late c186282 <c186282@nnada.net> - 2025-08-05 19:54 -0400
                Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late rbowman <bowman@montana.com> - 2025-08-06 06:37 +0000
                Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late c186282 <c186282@nnada.net> - 2025-08-06 04:03 -0400
                Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late not@telling.you.invalid (Computer Nerd Kev) - 2025-08-07 07:14 +1000
                Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late c186282 <c186282@nnada.net> - 2025-08-06 22:16 -0400
                Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late Richard Kettlewell <invalid@invalid.invalid> - 2025-08-07 18:20 +0100
                Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late The Natural Philosopher <tnp@invalid.invalid> - 2025-08-07 18:22 +0100
                Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late not@telling.you.invalid (Computer Nerd Kev) - 2025-08-08 09:10 +1000
                Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2025-08-06 07:39 -0700
                Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2025-08-11 19:40 +0000
            Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late Marc Haber <mh+usenetspam1118@zugschl.us> - 2025-08-02 10:07 +0200
              Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-08-02 23:32 +0000
                Re: Linux PC Acting Up? How To Check For Bad Blocks On A Hard Drive - Before It's Too Late c186282 <c186282@nnada.net> - 2025-08-02 21:36 -0400

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