Felix von Leitner

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Felix von Leitner at Chaos Communication Congress 2009

Felix von Leitner, nicknamed Fefe, is a German IT security expert living in Berlin. He is the main author of the dietlibc, a C standard library. His personal blog posts have received larger media coverage in Germany.


In 2006, he analysed disadvantages of the planned "Gesundheitskarte" (health card).[1]

Following a debate on the notability of his blog in the German Wikipedia, a controversial debate on notability in Wikipedia was started.[2]

He played a crucial role in distributing videos of a case of abusive policing on the 2009 Freiheit statt Angst ("Freedom instead of fear") demonstration, that in the end led to the obligation of the Berlin police to wear identification badges.[3][4]

In 2011, prior to the publication of Mac OS X Lion, he accused Apple of doing too little for its security.[5]

Felix von Leitner was a long term member of the Chaos Computer Club Berlin (CCC).[6]


  1. ^ Borchers, Detlef (2006-11-25). "Elektronische Gesundheitskarte: "Befreites Dokument" wirft Fragen auf". heise online (in German). Retrieved 2019-05-04.
  2. ^ Glechner, Claudia (2011-01-10). "Zwischen Qualität und Quantität" [Between Quality and Quantity]. news.ORF.at (in German). Retrieved 2019-05-04.
  3. ^ Stöcker, Christian (2009-09-13). "Demo gegen Überwachung: Faustschlag ins Gesicht". Spiegel Online (in German). Retrieved 2019-05-04.
  4. ^ "Parlament stimmt für Polizei-Namensschilder". www.morgenpost.de (in German). 2010-11-11. Retrieved 2019-05-04.
  5. ^ "Security experts take a close look at Lion". The H Security. 2011-03-01. Retrieved 2019-05-04.
  6. ^ von Leitner, Felix (2016-01-19). "Fefes Blog". blog.fefe.de (in German). Retrieved 2019-05-04.

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