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Re: Ah Python, you have spoiled me for all other languages

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From Ian Kelly <ian.g.kelly@gmail.com>
Date Sun, 24 May 2015 01:22:23 -0600
Subject Re: Ah Python, you have spoiled me for all other languages
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On Sat, May 23, 2015 at 8:57 PM, Michael Torrie <torriem@gmail.com> wrote:
> On 05/23/2015 05:40 AM, Chris Angelico wrote:
>> On Sat, May 23, 2015 at 9:34 PM, Tim Chase
>> <python.list@tim.thechases.com> wrote:
>>> A self-signed certificate may be of minimal worth the *first* time you
>>> visit a site, but if you return to the site, that initial
>>> certificate's signature can be used to confirm that you're talking to
>>> the same site you talked to previously.  This is particularly
>>> valuable on a laptop where you make initial contact over a (I
>>> hesitate to say "more secure") less hostile connection through your
>>> home ISP.  Then, when you're out at the library, coffee-shop, or some
>>> hacker convention on their wifi, it's possible to determine whether
>>> you're securely connecting to the *same* site, or whether an attempt
>>> is being made to MitM because the cert changed.
>>
>> You can get the exact same benefit (knowing when the cert changes)
>> with an externally-signed cert too. How many people actually bother to
>> check?
>
> Except that you won't be notified automatically.  A MitM attack nowadays
> most often uses a valid certificate signed by a recognized (though
> untrustworthy) CA.  Thus with a self-signed cert that you've previously
> accepted, you'll immediate know of the MitM attack.

I fail to see how this is the case. If a new certificate is suddenly
provided, why should the status of the *previous* certificate have
anything to do with whether the browser automatically notifies you? A
change from a self-signed certificate to a CA certificate likely just
means that the site has upgraded its certificate, not that a MitM
attack is underway.

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Ah Python, you have spoiled me for all other languages Steven D'Aprano <steve@pearwood.info> - 2015-05-23 00:58 +1000
  Re: Ah Python, you have spoiled me for all other languages Chris Angelico <rosuav@gmail.com> - 2015-05-23 01:29 +1000
    Re: Ah Python, you have spoiled me for all other languages wxjmfauth@gmail.com - 2015-05-22 10:57 -0700
    Re: Ah Python, you have spoiled me for all other languages Tim Daneliuk <tundra@tundraware.com> - 2015-05-22 16:40 -0500
    Re: Ah Python, you have spoiled me for all other languages Tim Daneliuk <tundra@tundraware.com> - 2015-05-22 16:40 -0500
      Re: Ah Python, you have spoiled me for all other languages Terry Reedy <tjreedy@udel.edu> - 2015-05-22 21:54 -0400
        Re: Ah Python, you have spoiled me for all other languages Tim Daneliuk <tundra@tundraware.com> - 2015-05-23 06:12 -0500
        Re: Ah Python, you have spoiled me for all other languages Tim Daneliuk <tundra@tundraware.com> - 2015-05-23 06:12 -0500
          Re: Ah Python, you have spoiled me for all other languages Terry Reedy <tjreedy@udel.edu> - 2015-05-23 13:26 -0400
      Re: Ah Python, you have spoiled me for all other languages Michael Torrie <torriem@gmail.com> - 2015-05-22 21:31 -0600
        Re: Ah Python, you have spoiled me for all other languages Johannes Bauer <dfnsonfsduifb@gmx.de> - 2015-05-23 08:55 +0200
          Re: Ah Python, you have spoiled me for all other languages Tim Daneliuk <tundra@tundraware.com> - 2015-05-23 06:21 -0500
            Re: Ah Python, you have spoiled me for all other languages Johannes Bauer <dfnsonfsduifb@gmx.de> - 2015-05-23 15:24 +0200
              Re: Ah Python, you have spoiled me for all other languages Marko Rauhamaa <marko@pacujo.net> - 2015-05-23 20:05 +0300
                Re: Ah Python, you have spoiled me for all other languages Johannes Bauer <dfnsonfsduifb@gmx.de> - 2015-05-24 20:29 +0200
          Re: Ah Python, you have spoiled me for all other languages Marko Rauhamaa <marko@pacujo.net> - 2015-05-23 15:44 +0300
            Re: Ah Python, you have spoiled me for all other languages Johannes Bauer <dfnsonfsduifb@gmx.de> - 2015-05-23 15:17 +0200
            Re: Ah Python, you have spoiled me for all other languages Steven D'Aprano <steve@pearwood.info> - 2015-05-24 00:00 +1000
              Re: Ah Python, you have spoiled me for all other languages Marko Rauhamaa <marko@pacujo.net> - 2015-05-23 19:53 +0300
                Re: Ah Python, you have spoiled me for all other languages Chris Angelico <rosuav@gmail.com> - 2015-05-24 03:41 +1000
                Re: Ah Python, you have spoiled me for all other languages Marko Rauhamaa <marko@pacujo.net> - 2015-05-23 22:02 +0300
                Re: Ah Python, you have spoiled me for all other languages Steven D'Aprano <steve@pearwood.info> - 2015-05-24 20:26 +1000
                Re: Ah Python, you have spoiled me for all other languages Marko Rauhamaa <marko@pacujo.net> - 2015-05-24 18:26 +0300
                Re: Ah Python, you have spoiled me for all other languages Chris Angelico <rosuav@gmail.com> - 2015-05-25 01:35 +1000
                Re: Ah Python, you have spoiled me for all other languages Marko Rauhamaa <marko@pacujo.net> - 2015-05-25 09:57 +0300
                Re: Ah Python, you have spoiled me for all other languages Laura Creighton <lac@openend.se> - 2015-05-25 11:39 +0200
                Re: Ah Python, you have spoiled me for all other languages Chris Angelico <rosuav@gmail.com> - 2015-05-25 21:09 +1000
            Re: Ah Python, you have spoiled me for all other languages Michael Torrie <torriem@gmail.com> - 2015-05-23 21:00 -0600
              Re: Ah Python, you have spoiled me for all other languages Marko Rauhamaa <marko@pacujo.net> - 2015-05-24 11:23 +0300
      Re: Ah Python, you have spoiled me for all other languages Ian Kelly <ian.g.kelly@gmail.com> - 2015-05-22 22:10 -0600
      Re: Ah Python, you have spoiled me for all other languages amber <amber.of.luxor@gmail.com> - 2015-05-23 04:11 +0000
        Re: Ah Python, you have spoiled me for all other languages Tim Daneliuk <tundra@tundraware.com> - 2015-05-23 06:11 -0500
        Re: Ah Python, you have spoiled me for all other languages Tim Daneliuk <tundra@tundraware.com> - 2015-05-23 06:11 -0500
      Re: Ah Python, you have spoiled me for all other languages Ben Finney <ben+python@benfinney.id.au> - 2015-05-23 14:20 +1000
      Re: Ah Python, you have spoiled me for all other languages Michael Torrie <torriem@gmail.com> - 2015-05-22 22:30 -0600
        Re: Ah Python, you have spoiled me for all other languages Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2015-05-23 11:10 +0000
          Re: Ah Python, you have spoiled me for all other languages Tim Chase <python.list@tim.thechases.com> - 2015-05-23 06:34 -0500
          Re: Ah Python, you have spoiled me for all other languages Chris Angelico <rosuav@gmail.com> - 2015-05-23 21:40 +1000
          Re: Ah Python, you have spoiled me for all other languages Michael Torrie <torriem@gmail.com> - 2015-05-23 20:57 -0600
          Re: Ah Python, you have spoiled me for all other languages Ian Kelly <ian.g.kelly@gmail.com> - 2015-05-24 01:22 -0600
      Re: Ah Python, you have spoiled me for all other languages Ian Kelly <ian.g.kelly@gmail.com> - 2015-05-22 22:29 -0600
      Re: Ah Python, you have spoiled me for all other languages Ian Kelly <ian.g.kelly@gmail.com> - 2015-05-22 22:49 -0600
      Re: Ah Python, you have spoiled me for all other languages Chris Angelico <rosuav@gmail.com> - 2015-05-23 14:49 +1000
        Re: Ah Python, you have spoiled me for all other languages Tim Daneliuk <tundra@tundraware.com> - 2015-05-23 06:29 -0500
      Re: Ah Python, you have spoiled me for all other languages Chris Angelico <rosuav@gmail.com> - 2015-05-23 14:55 +1000
      Re: Ah Python, you have spoiled me for all other languages Chris Angelico <rosuav@gmail.com> - 2015-05-23 14:28 +1000
      Re: Ah Python, you have spoiled me for all other languages Chris Angelico <rosuav@gmail.com> - 2015-05-23 14:21 +1000
    Re: Ah Python, you have spoiled me for all other languages Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-05-23 14:33 +0200
      Re: Ah Python, you have spoiled me for all other languages Steven D'Aprano <steve@pearwood.info> - 2015-05-23 23:01 +1000
        Re: Ah Python, you have spoiled me for all other languages Chris Angelico <rosuav@gmail.com> - 2015-05-23 23:12 +1000
          Re: Ah Python, you have spoiled me for all other languages wxjmfauth@gmail.com - 2015-05-23 23:37 -0700
        Re: Ah Python, you have spoiled me for all other languages Ned Batchelder <ned@nedbatchelder.com> - 2015-05-23 06:35 -0700
          Re: Ah Python, you have spoiled me for all other languages Steven D'Aprano <steve@pearwood.info> - 2015-05-24 00:09 +1000
          Re: Ah Python, you have spoiled me for all other languages Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-06-07 10:21 +0200
            Re: Ah Python, you have spoiled me for all other languages Steven D'Aprano <steve@pearwood.info> - 2015-06-07 21:42 +1000
              Re: Ah Python, you have spoiled me for all other languages Chris Angelico <rosuav@gmail.com> - 2015-06-07 22:08 +1000
                Re: Ah Python, you have spoiled me for all other languages Steven D'Aprano <steve@pearwood.info> - 2015-06-07 23:24 +1000
                Re: Ah Python, you have spoiled me for all other languages Chris Angelico <rosuav@gmail.com> - 2015-06-08 00:47 +1000
              Re: Ah Python, you have spoiled me for all other languages random832@fastmail.us - 2015-06-07 10:58 -0400
                Re: Ah Python, you have spoiled me for all other languages Steven D'Aprano <steve@pearwood.info> - 2015-06-08 02:28 +1000
  Re: Ah Python, you have spoiled me for all other languages Tony the Tiger <tony@tiger.invalid> - 2015-05-22 16:31 +0000
    Re: Ah Python, you have spoiled me for all other languages Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-05-22 17:57 +0100
    Re: Ah Python, you have spoiled me for all other languages Tim Daneliuk <tundra@tundraware.com> - 2015-05-22 16:41 -0500
      Re: Ah Python, you have spoiled me for all other languages Tony the Tiger <tony@tiger.invalid> - 2015-05-23 20:25 +0000
  Re: Ah Python, you have spoiled me for all other languages Grant Edwards <invalid@invalid.invalid> - 2015-05-22 17:47 +0000
    Re: Ah Python, you have spoiled me for all other languages Chris Angelico <rosuav@gmail.com> - 2015-05-23 04:11 +1000
    Re: Ah Python, you have spoiled me for all other languages mm0fmf <none@mailinator.com> - 2015-05-22 19:19 +0100
    Re: Ah Python, you have spoiled me for all other languages Laura Creighton <lac@openend.se> - 2015-05-22 21:14 +0200
      Re: Ah Python, you have spoiled me for all other languages Steven D'Aprano <steve@pearwood.info> - 2015-05-23 11:36 +1000
    Re: Ah Python, you have spoiled me for all other languages MRAB <python@mrabarnett.plus.com> - 2015-05-22 20:34 +0100
    Re: Ah Python, you have spoiled me for all other languages Ian Kelly <ian.g.kelly@gmail.com> - 2015-05-22 13:56 -0600
      Re: Ah Python, you have spoiled me for all other languages Marko Rauhamaa <marko@pacujo.net> - 2015-05-22 23:34 +0300
        Re: Ah Python, you have spoiled me for all other languages Tim Chase <python.list@tim.thechases.com> - 2015-05-22 15:55 -0500
        Re: Ah Python, you have spoiled me for all other languages Ethan Furman <ethan@stoneleaf.us> - 2015-05-22 14:15 -0700
        Re: Ah Python, you have spoiled me for all other languages Ian Kelly <ian.g.kelly@gmail.com> - 2015-05-22 15:20 -0600
  Re: Ah Python, you have spoiled me for all other languages Paul Rubin <no.email@nospam.invalid> - 2015-05-22 16:00 -0700
    Re: Ah Python, you have spoiled me for all other languages Michael Torrie <torriem@gmail.com> - 2015-05-22 21:33 -0600

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