From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it? Date: Thu, 10 Feb 2022 08:26:03 +0200 Message-ID: <835ypnutj8.fsf@gnu.org> 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> <83tudf2h4z.fsf@gnu.org> <83sfswz834.fsf@gnu.org> <83leymyfz8.fsf@gnu.org> <83sfstwnve.fsf@gnu.org> <83v8xoup27.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="27681"; mail-complaints-to="usenet@ciao.gmane.io" Cc: psainty@orcon.net.nz, luangruo@yahoo.com, kevin.legouguec@gmail.com, emacs-devel@gnu.org To: rms@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Feb 10 07:30:27 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 1nI2yH-00073Q-Sh for ged-emacs-devel@m.gmane-mx.org; Thu, 10 Feb 2022 07:30:26 +0100 Original-Received: from localhost ([::1]:33914 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nI2yG-0003jj-3V for ged-emacs-devel@m.gmane-mx.org; Thu, 10 Feb 2022 01:30:24 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:50762) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nI2uS-00010e-Kq for emacs-devel@gnu.org; Thu, 10 Feb 2022 01:26:28 -0500 Original-Received: from [2001:470:142:3::e] (port=50110 helo=fencepost.gnu.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nI2uR-00043x-Px; Thu, 10 Feb 2022 01:26:27 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=VconJCJXQfPcwTmHhB7UMcOxrlg9LjIQJQtsrHsyN0U=; b=KUygcFsmS45t lDDxxEzwAiOowgjRnUAsdwuPt8PkZzOTU+xw+jiqMxHdODYX/16MFXMRgPZ5G4yCA/dJLj5/hfjm3 k9JcDpDoQeC1FYp5yoOl4BCuIajx/9/1NDI2ofYD74ecUs26W2aMF/c25CZ0a/HFId4U9jR2W5iAV hj1Mm+ALQs/g/fM64g4MrQPWpmF20sEjKK+zX7sTzKTR4mfcUSx+49+kKBU0/FUnrYvpPU5G/FpQn WwZtrzE3y/vgsb6iwAYy+KyAq4OLlfP9nqB/eO1DExwjA5hedU3eDjs1QAIQ8ccgfZWu3orb9wGMz N04+3TNX63v0ikkVgFxasg==; Original-Received: from [87.69.77.57] (port=3568 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nI2u9-000421-8O; Thu, 10 Feb 2022 01:26:09 -0500 In-Reply-To: (message from Richard Stallman on Wed, 09 Feb 2022 22:57:51 -0500) 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:286124 Archived-At: > From: Richard Stallman > Cc: psainty@orcon.net.nz, luangruo@yahoo.com, emacs-devel@gnu.org, > kevin.legouguec@gmail.com > Date: Wed, 09 Feb 2022 22:57:51 -0500 > > > If I understand correctly what you want, you should use U+25CC DOTTED > > CIRCLE before the combining character, not SPACE. > > Maybe that is right, but I don't understand it. > Why is that right? The dotted circle is the accepted method of showing stand-alone combining characters. It is used everywhere, and U+25CC exists for that very purpose. > > > It wouldn't be very hard to add a list of extra decompositions that > > > are not known to Unicode itself. > > > Sure, but that means we'd need some manually-maintained database > > anyway. > > Maybe so. But these automatic methds will make a good simplification > even if it doesn't simplify everything perfectly. We disagree about whether this is a significant simplification. Looking at the giant Lynx-derived database in latin1-disp.el, I fail to see how making a small part of it auto-generated would be a win.