From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Yuri Khan Newsgroups: gmane.emacs.devel Subject: Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it? Date: Thu, 3 Feb 2022 15:16:27 +0700 Message-ID: References: <87sftk49ih.fsf@yahoo.com> <837dawt0h4.fsf@gnu.org> <838rv9plyf.fsf@gnu.org> <837dasntoj.fsf@gnu.org> <834k5tl4a9.fsf@gnu.org> <87mtjkt6m9.fsf@gmail.com> <83ilu8htws.fsf@gnu.org> <3E718CA2-889F-4AEE-B79C-EB3A221D1CB2@gnu.org> <83o83wc7gs.fsf@gnu.org> <8335l5brov.fsf@gnu.org> <83mtjc838i.fsf@gnu.org> <83zgna7hyd.fsf@gnu.org> <83ee4l78rw.fsf@gnu.org> <837dac5qth.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="38880"; mail-complaints-to="usenet@ciao.gmane.io" Cc: Phil Sainty , Po Lu , =?UTF-8?Q?K=C3=A9vin_Le_Gouguec?= , Richard Stallman , Emacs developers To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Feb 03 09:23:58 2022 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nFXPK-0009wB-I3 for ged-emacs-devel@m.gmane-mx.org; Thu, 03 Feb 2022 09:23:58 +0100 Original-Received: from localhost ([::1]:58348 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nFXPJ-00042K-56 for ged-emacs-devel@m.gmane-mx.org; Thu, 03 Feb 2022 03:23:57 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:52714) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nFXIK-00012U-Ff for emacs-devel@gnu.org; Thu, 03 Feb 2022 03:16:49 -0500 Original-Received: from [2607:f8b0:4864:20::932] (port=46623 helo=mail-ua1-x932.google.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nFXII-0002cT-Ed; Thu, 03 Feb 2022 03:16:43 -0500 Original-Received: by mail-ua1-x932.google.com with SMTP id c36so3704251uae.13; Thu, 03 Feb 2022 00:16:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=wYndsHKClPPEdcpA9Lw/O7t8pqsFlvA0dtglAKaVmp8=; b=aex1PD0HEv7+/QuDuhm0t6iI1eHbcNCJARYHQPFveFpZC0qR9fTHzcncTOeZpHrOCY B8yUvgkWmdlkDE2M+vEoPgApQhIHUspypbLKmmIgzgQrIqLNua2slMAwi/Ckkt8LnUQ7 FTUtlK+NJ0Gw5cioYzqL8XwUQvXKxzVIWM2o85igXq7GeMzG2NVTS/LK5cP3EbiQdymY 9LVmScmghiO7ZzBJINkT60gKta+9Y86KzWCiwFY12huGSjZTjisMa4arebP1PfCaCLM9 m8SgUc+/u1qtKV5Aa7ZyXQhaZVwgKb1omeIByrSk7lWMtcBs8MPq7ynzBtyJYgjJl1QQ rS+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=wYndsHKClPPEdcpA9Lw/O7t8pqsFlvA0dtglAKaVmp8=; b=lU69OF2A6xWkoPIOaC00iLasjhuG9JtkkSHRRBmskmu14KOQ3APwNIqnF5DEBy4XIh 9HiyAHG6TLYxS3wpDZu6f3MTTjesJziZ23XJi5dXRLmAikRuwFKKs+NVqssCBWXDYPUb vllVLNCYhJyJXmliJ+NDtJDwqbpJ+Lw8/NMkLUCkwZa4tKIFygfR9zOEFWMa02jGy+cN nG65iqoxPOd/mS9ity4rSzojiPo8cn91qvIC/oxXSZE8SUp28H+Lpfk5aS9KPO8WGIDu LHF+dVVB3cpVCrZZ79unvpepzJ4njjrz/Xd++xhPwAPXclN2JfxrE9oTP58Vd80Bcp6H 2OzQ== X-Gm-Message-State: AOAM531FCnh7DTsdLTwLte7QytuU4tUeTJkQnCUb7ouUMkhL1VdZxDEi ObDKGnV6R2cCNBfyZSw1TRRMUWcbdVIMfVAyTirHJfKCWyc= X-Google-Smtp-Source: ABdhPJz8z0YFU+XuVMW6RW9gLsw8iOJi4/lA5SxErupledJnDJ470FTwgrkhqRZrnukgm+ukmD+yhLdx0XZO9DJd1yw= X-Received: by 2002:a67:f70f:: with SMTP id m15mr13065648vso.61.1643876199691; Thu, 03 Feb 2022 00:16:39 -0800 (PST) In-Reply-To: <837dac5qth.fsf@gnu.org> X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::932 (failed) Received-SPF: pass client-ip=2607:f8b0:4864:20::932; envelope-from=yurivkhan@gmail.com; helo=mail-ua1-x932.google.com X-Spam_score_int: -12 X-Spam_score: -1.3 X-Spam_bar: - X-Spam_report: (-1.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, PDS_HP_HELO_NORDNS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:285835 Archived-At: On Thu, 3 Feb 2022 at 15:09, Eli Zaretskii wrote: > > Sorry, somehow I misremembered and thought the character was a with > > macron and tilde. Was it actually a with breve and tilde? > > Then the natural visual representations would be =C4=83~ (a with breve, > > then tilde) and =C3=A3=CB=98 (a with tilde, then breve), > > Either one would be fine, but the former is better, I think, since ~ > is an ASCII character, and so is universally supported. The ordering of diacritics on the same side of the base character is considered significant in Unicode, so =C4=83~ and =C3=A3=CB=98 would be representations of different grapheme clusters =E2=80=94 =E2=80=9Ca with br= eve and tilde=E2=80=9D and =E2=80=9Ca with tilde and breve=E2=80=9D, respectively. The issue of any characters used not being universally available is still valid, of course.