From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id 579E51381F3 for ; Fri, 13 Sep 2013 19:21:39 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 05873E0B78; Fri, 13 Sep 2013 19:21:33 +0000 (UTC) Received: from mail-qc0-f180.google.com (mail-qc0-f180.google.com [209.85.216.180]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 05DEFE0A7C for ; Fri, 13 Sep 2013 19:21:31 +0000 (UTC) Received: by mail-qc0-f180.google.com with SMTP id p19so1169370qcv.39 for ; Fri, 13 Sep 2013 12:21:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=0qCfF6Y8FMmXC7XUGm57WzbGxi57i96BiA09dDCFvls=; b=idxVUqrBgtYzjXO/kyWz85CbKvg1PAwfg94rlPoKKJW2J4OsAyidVKrRZs65no5+KI Vj1kVGCgW+xuhJHkxfsToy67e4yaL0e0Q/rlPk29gp0n0WWi+1QWXI42EKbb6ZCahqYH /QDGSas6sLER81AGP8goNwaQI7YxpfftUOG8OTwn/aTFwKKvzvhL6iVhJVTz5MYTIxd8 VlQECHE6UwZ/00v4w/+YK/5xXiBtgZsLOPUf4vAZMTMMmHGKWpWTgDlvRN29mWKxjjc1 wAWGYbuJejjXOe+5Fo6XbvrYzzEDcJiv1NaWiwJxAaXJzG6eHHrmNmgqUU25Yk8mdPpD jjpQ== Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 X-Received: by 10.49.96.225 with SMTP id dv1mr27706554qeb.89.1379100091091; Fri, 13 Sep 2013 12:21:31 -0700 (PDT) Received: by 10.140.25.83 with HTTP; Fri, 13 Sep 2013 12:21:31 -0700 (PDT) In-Reply-To: <5228A69B.5010900@gmail.com> References: <5228A69B.5010900@gmail.com> Date: Fri, 13 Sep 2013 12:21:31 -0700 Message-ID: Subject: Re: [gentoo-user] {OT} image metadata and privacy From: Grant To: Gentoo mailing list Content-Type: text/plain; charset=ISO-8859-1 X-Archives-Salt: 12b75aae-349c-4d7d-8736-67c0d0790c0d X-Archives-Hash: d0eeb50c67f0d27d30b9ce8009ebf366 > Yes, I just had to do this myself. > > There are two packages: jhead and exiftool. The former does jpegs only. > I wound up using exiftool, there's a single command to strip all metadata: > > exiftool -all= *.jpg > > If I remember right that creates a copy of the file it processes. > > You can use exiftool to list tags and also remove individual tags. I > used it to make sure there were no GPS tags in pictures from my phone. I thought I had some problems getting exiftool to work with a PNG file but now I realize I didn't understand how to use it. I think that should be the de facto method for removing EXIF data from many different image formats. - Grant >> Has anyone found a way to completely sanitize images of all >> potentially privacy-invading metadata for posting online? I recently >> discovered that there is actually an EXIF thumbnail image. So if you >> have a photo and you crop it and post it online, the EXIF thumbnail of >> the original uncropped image is still there for all to see. >> >> - Grant