Dear Tails developers, as you rely on MAT, the Metadata Anonymization Toolkit, I would like to make you aware of a deficiency in MAT's current metadata removal algorithm for PDF. In short, it is non-recursive. This means it cannot remove metadata in images (and possibly other files) embedded in PDF files. Be sure to re-check output files after using MAT.
htgoebel who discovered this bug reported it as a feature request in early February <https://labs.riseup.net/code/issues/11067> but it received no attention until I emailed jvoisin in early May. Until this bug is fixed, htgoebel and I think it important to educate Tails users about it. That is why we published an article about Tails, MAT and this bug on the Digitalcourage website in English and German: [en] https://digitalcourage.de/blog/2016/using-tails-be-careful-embedded-metadata [de] https://digitalcourage.de/blog/2016/sicherheitsluecke-in-mat-tails-wird-geschlossen Digitalcourage is a privacy and digital rights NGO known for handing out Big Brother Awards in Germany. It also runs a Tor exit node and an anti-censorship DNS server. htgoebel and I are volunteers there. Many thanks for your great work! Christian -- Christian Pietsch Digitalcourage e.V., Marktstr. 18, D-33602 Bielefeld, Germany Tel: +49-521-1639 1639 | Fax: +49-521-61172 | [email protected] https://digitalcourage.de | https://bigbrotherawards.de Vorratsdatenspeicherung? Nicht schon wieder! Unterstützen Sie unsere Verfassungsbeschwerde: https://digitalcourage.de/weg-mit-vds
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