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Re: [sOT] compression 1 GB downto 100 MB

From Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups comp.lang.c
Subject Re: [sOT] compression 1 GB downto 100 MB
Date 2016-06-19 01:37 +0100
Organization A noiseless patient Spider
Message-ID <87r3burp3l.fsf@bsb.me.uk> (permalink)
References (4 earlier) <6f9b9b25-8347-4cbc-a23a-9e6c273bf6d2@googlegroups.com> <nk3503$7v0$1@dont-email.me> <be950b83-2eab-48aa-9616-ccc2174bf61c@googlegroups.com> <nk46d0$3oa$1@dont-email.me> <nk488q$94m$2@dont-email.me>

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Richard Heathfield <rjh@cpax.org.uk> writes:

> On 18/06/16 20:11, Bill Cunningham wrote:
> <snip>
>>
>>      Truely random can't be compressed?
>
> Right.
>
>> If there's a header indicating the
>> algorithm of randomness,  or encryption why not?
>
> If you can generate it via an algorithm, it isn't truly random.

Technically you always can.  It's when the algorithm is significantly
shorter than the data that the sequence is far from truly random.

-- 
Ben.

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Thread

[sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-16 07:25 -0700
  Re: [sOT] compression 1 GB downto 100 MB mark.bluemel@gmail.com - 2016-06-16 08:08 -0700
    Re: [sOT] compression 1 GB downto 100 MB Lynn McGuire <lmc@winsim.com> - 2016-06-17 12:04 -0500
      Re: [sOT] compression 1 GB downto 100 MB Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-06-17 10:16 -0700
        Re: [sOT] compression 1 GB downto 100 MB "Chris M. Thomasson" <nospam@nospam.invalid> - 2016-06-17 23:08 -0700
  Re: [sOT] compression 1 GB downto 100 MB Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-06-16 08:09 -0700
    Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-16 08:15 -0700
      Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-16 08:18 -0700
        Re: [sOT] compression 1 GB downto 100 MB mark.bluemel@gmail.com - 2016-06-17 01:28 -0700
          Re: [sOT] compression 1 GB downto 100 MB Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-06-17 02:03 -0700
            Re: [sOT] compression 1 GB downto 100 MB Richard Heathfield <rjh@cpax.org.uk> - 2016-06-17 10:34 +0100
              Re: [sOT] compression 1 GB downto 100 MB BartC <bc@freeuk.com> - 2016-06-17 10:44 +0100
                Re: [sOT] compression 1 GB downto 100 MB Richard Heathfield <rjh@cpax.org.uk> - 2016-06-17 11:03 +0100
                Re: [sOT] compression 1 GB downto 100 MB Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-06-17 03:51 -0700
                Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-18 02:16 -0700
                Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-18 02:29 -0700
                Re: [sOT] compression 1 GB downto 100 MB "Osmium" <r124c4u102@comcast.net> - 2016-06-17 08:19 -0500
                Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-18 03:17 -0700
              Re: [sOT] compression 1 GB downto 100 MB Gareth Owen <gwowen@gmail.com> - 2016-06-17 18:32 +0100
      Re: [sOT] compression 1 GB downto 100 MB Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-06-16 08:43 -0700
        Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-16 08:48 -0700
      Re: [sOT] compression 1 GB downto 100 MB "Osmium" <r124c4u102@comcast.net> - 2016-06-16 10:49 -0500
        Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-16 09:10 -0700
          Re: [sOT] compression 1 GB downto 100 MB Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-06-16 09:36 -0700
            Re: [sOT] compression 1 GB downto 100 MB Keith Thompson <kst-u@mib.org> - 2016-06-16 11:18 -0700
          Re: [sOT] compression 1 GB downto 100 MB "Osmium" <r124c4u102@comcast.net> - 2016-06-16 13:13 -0500
            Re: [sOT] compression 1 GB downto 100 MB Gareth Owen <gwowen@gmail.com> - 2016-06-16 20:18 +0100
              Re: [sOT] compression 1 GB downto 100 MB Richard Heathfield <rjh@cpax.org.uk> - 2016-06-16 22:07 +0100
                Re: [sOT] compression 1 GB downto 100 MB Gareth Owen <gwowen@gmail.com> - 2016-06-17 06:04 +0100
              Re: [sOT] compression 1 GB downto 100 MB Robert Wessel <robertwessel2@yahoo.com> - 2016-06-16 23:21 -0500
                Re: [sOT] compression 1 GB downto 100 MB "Osmium" <r124c4u102@comcast.net> - 2016-06-17 07:49 -0500
                Re: [sOT] compression 1 GB downto 100 MB Robert Wessel <robertwessel2@yahoo.com> - 2016-06-17 12:47 -0500
                Re: [sOT] compression 1 GB downto 100 MB "Osmium" <r124c4u102@comcast.net> - 2016-06-17 14:47 -0500
                Re: [sOT] compression 1 GB downto 100 MB Robert Wessel <robertwessel2@yahoo.com> - 2016-06-17 23:32 -0500
                Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-18 01:33 -0700
            Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-17 14:51 -0700
      Re: [sOT] compression 1 GB downto 100 MB BartC <bc@freeuk.com> - 2016-06-16 16:50 +0100
        Re: [sOT] compression 1 GB downto 100 MB BartC <bc@freeuk.com> - 2016-06-17 16:20 +0100
    Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-16 08:34 -0700
  Re: [sOT] compression 1 GB downto 100 MB Les Cargill <lcargill99@comcast.com> - 2016-06-16 12:55 -0500
  Re: [sOT] compression 1 GB downto 100 MB "Chris M. Thomasson" <nospam@nospam.invalid> - 2016-06-16 11:53 -0700
    Re: [sOT] compression 1 GB downto 100 MB "Chris M. Thomasson" <nospam@nospam.invalid> - 2016-06-16 12:14 -0700
    Re: [sOT] compression 1 GB downto 100 MB "Chris M. Thomasson" <nospam@nospam.invalid> - 2016-06-17 12:33 -0700
      Re: [sOT] compression 1 GB downto 100 MB "Chris M. Thomasson" <nospam@nospam.invalid> - 2016-06-17 12:46 -0700
    Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-17 15:04 -0700
      Re: [sOT] compression 1 GB downto 100 MB "Chris M. Thomasson" <nospam@nospam.invalid> - 2016-06-17 22:55 -0700
        Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-18 01:38 -0700
          Re: [sOT] compression 1 GB downto 100 MB BartC <bc@freeuk.com> - 2016-06-18 10:41 +0100
            Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-18 02:55 -0700
            Re: [sOT] compression 1 GB downto 100 MB Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-06-18 05:08 -0700
              Re: [sOT] compression 1 GB downto 100 MB "Bill Cunningham" <nospam@nspam.invalid> - 2016-06-18 15:11 -0400
                Re: [sOT] compression 1 GB downto 100 MB "Bill Cunningham" <nospam@nspam.invalid> - 2016-06-18 15:13 -0400
                Re: [sOT] compression 1 GB downto 100 MB luser droog <luser.droog@gmail.com> - 2016-06-18 12:43 -0700
                Re: [sOT] compression 1 GB downto 100 MB Richard Heathfield <rjh@cpax.org.uk> - 2016-06-18 20:43 +0100
                Re: [sOT] compression 1 GB downto 100 MB "Chris M. Thomasson" <nospam@nospam.invalid> - 2016-06-18 12:53 -0700
                Re: [sOT] compression 1 GB downto 100 MB "Chris M. Thomasson" <nospam@nospam.invalid> - 2016-06-20 20:32 -0700
                Re: [sOT] compression 1 GB downto 100 MB Keith Thompson <kst-u@mib.org> - 2016-06-18 13:22 -0700
                Re: [sOT] compression 1 GB downto 100 MB Jerry Stuckle <jstucklex@attglobal.net> - 2016-06-18 16:35 -0400
                Re: [sOT] compression 1 GB downto 100 MB Jerry Stuckle <jstucklex@attglobal.net> - 2016-06-18 21:37 -0400
                Re: [sOT] compression 1 GB downto 100 MB "James R. Kuyper" <jameskuyper@verizon.net> - 2016-06-18 16:59 -0400
                Re: [sOT] compression 1 GB downto 100 MB crisdunbar@gmail.com - 2016-06-20 09:55 -0700
                Re: [sOT] compression 1 GB downto 100 MB Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-06-20 21:22 +0100
                Re: [sOT] compression 1 GB downto 100 MB cris <crisdunbar@gmail.com> - 2016-06-20 17:13 -0700
                Re: [sOT] compression 1 GB downto 100 MB Tim Rentsch <txr@alumni.caltech.edu> - 2016-06-21 10:42 -0700
                Re: [sOT] compression 1 GB downto 100 MB Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-06-21 20:09 +0100
                Re: [sOT] compression 1 GB downto 100 MB crisdunbar@gmail.com - 2016-06-21 13:39 -0700
                Re: [sOT] compression 1 GB downto 100 MB Keith Thompson <kst-u@mib.org> - 2016-06-22 08:34 -0700
                Re: [sOT] compression 1 GB downto 100 MB Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-06-22 19:48 +0100
                Re: [sOT] compression 1 GB downto 100 MB Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-06-19 01:37 +0100
                Re: [sOT] compression 1 GB downto 100 MB Richard Heathfield <rjh@cpax.org.uk> - 2016-06-19 02:22 +0100
                Re: [sOT] compression 1 GB downto 100 MB Jerry Stuckle <jstucklex@attglobal.net> - 2016-06-18 21:30 -0400
                Re: [sOT] compression 1 GB downto 100 MB Richard Heathfield <rjh@cpax.org.uk> - 2016-06-19 02:41 +0100
                Re: [sOT] compression 1 GB downto 100 MB Jerry Stuckle <jstucklex@attglobal.net> - 2016-06-18 21:55 -0400
                Re: [sOT] compression 1 GB downto 100 MB Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-06-19 03:20 +0100
                Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-19 02:53 -0700
                Re: [sOT] compression 1 GB downto 100 MB Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-06-18 16:05 -0700
                Re: [sOT] compression 1 GB downto 100 MB "J. Clarke" <j.clarke.873638@gmail.com> - 2016-06-19 06:59 -0400
                Re: [sOT] compression 1 GB downto 100 MB fir <profesor.fir@gmail.com> - 2016-06-19 05:55 -0700
                Re: [sOT] compression 1 GB downto 100 MB Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-06-19 06:13 -0700
                Re: [sOT] compression 1 GB downto 100 MB "J. Clarke" <j.clarke.873638@gmail.com> - 2016-06-26 12:26 -0400
                Re: [sOT] compression 1 GB downto 100 MB Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-06-26 09:53 -0700
              Re: [sOT] compression 1 GB downto 100 MB Richard Heathfield <rjh@cpax.org.uk> - 2016-06-18 20:41 +0100
              Re: [sOT] compression 1 GB downto 100 MB "J. Clarke" <j.clarke.873638@gmail.com> - 2016-06-19 06:45 -0400
            Re: [sOT] compression 1 GB downto 100 MB Robert Wessel <robertwessel2@yahoo.com> - 2016-06-18 14:42 -0500
            Re: [sOT] compression 1 GB downto 100 MB gordonb.vnsk1@burditt.org (Gordon Burditt) - 2016-06-20 01:13 -0500
              Re: [sOT] compression 1 GB downto 100 MB Keith Thompson <kst-u@mib.org> - 2016-06-20 12:16 -0700
                Re: [sOT] compression 1 GB downto 100 MB David Brown <david.brown@hesbynett.no> - 2016-06-20 21:27 +0200
                Re: [sOT] compression 1 GB downto 100 MB Xaltonon <xaltonon@gmail.com> - 2016-06-20 21:25 -0700

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