David Kriesel

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David Kriesel (* 1984 in Bonn ) is a German computer scientist and data scientist .

Life

David Kriesel attended school in Meckenheim and Brussels . At the age of 14 he was already working freelance in the IT sector. In 2003 he began studying computer science with a minor in biology at the Rheinische Friedrich-Wilhelms-Universität Bonn . In 2007, he completed a research fellowship at Cornell University on machine learning , swarm behavior and robotics . In 2009 he completed his studies with a thesis on machine learning, swarm behavior, distributed networks and neural networks . Currently (as of 2020) he is employed as the head of technology at Procter & Gamble .

Kriesel lives in Rheinbach .

The Xerox bug

Kriesel first attracted attention with the publication of a software bug in Xerox devices, which apparently systematically, but very irregularly, changed numbers on scanned documents during scans. The particularly fatal thing was that the users could not directly recognize these falsified documents as such. Kriesel made the discovery on July 24, 2013 and immediately reported the error to Xerox. However, after no help from the company came after a week, Kriesel published his discovery on his website. His entry quickly went around the world. International specialist and mass media also wrote reports and articles.

After almost a month, Xerox found and patched the background to the bug. The compression mode JBIG2 was named as a source of error . Xerox suspected that the problem was eight years old at the time and affected well over 100,000 devices worldwide.

Data analytics lectures

Kriesel gives lectures in German and English. It also collects data independently and evaluates it. From July 1, 2014 to April 17, 2016, he analyzed a total of 63,312 Spiegel online articles and evaluated them in full. His lectures on data analysis take place regularly at the Chaos Communication Congress .

In 2019 he analyzed Deutsche Bahn with regard to punctuality and reliability. He presented his results at the 36th Chaos Communication Congress. Further lectures and blog entries dealt with the evaluation of the Sunday question , the Xerox scanner bug mentioned above or the answers of the individual parties from Wahl-O-Mat .

Web links

Individual evidence

  1. ↑ Distributed, evolutionary optimization of swarms. D. Kriesel, accessed January 13, 2020 (blog).
  2. ↑ Christoph Jehle: Xerox software changes scanned numbers. Retrieved January 14, 2020 .
  3. ↑ DER SPIEGEL: Blogger writes a bug: Xerox scan copiers are supposed to swap numbers. - DER SPIEGEL - Netzwelt. Retrieved January 14, 2020 .
  4. ↑ Confused copiers rewriting scans . August 7, 2013 ( online [accessed January 14, 2020]).
  5. ↑ Devin Coldewey, NBC News: Copier conundrum: Xerox machines swap numbers during scans. August 7, 2013, accessed January 14, 2020 .
  6. ↑ Xerox: Press release on the bug and announced patch. In: http://realbusinessatxerox.blogs.xerox.com/ . Xerox Corporation, August 7, 2013, accessed January 14, 2020 .
  7. ↑ mirror Mining. Spiegel editors also celebrate Christmas. An analysis of 70,000 SpiegelOnline articles. D. Kriesel, accessed January 13, 2020 (blog).
  8. ↑ Video and slides of my 33C3 lecture "SpiegelMining". D. Kriesel, accessed January 13, 2020 (blog).
  9. ↑ Andrea Diener : Chaos Communication Congress: How punctual is the train really? In: FAZ . December 29, 2019, ISSN  0174-4909 ( Online [accessed January 14, 2020]).
  10. ↑ Stefan Krempl: 36C3: BahnMining reveals the naked truth behind the DB punctuality rate. In: heise online. Retrieved January 14, 2020 .
  11. ↑ Sunday question on the federal election, continuously updated. D. Kriesel, accessed January 13, 2020 (blog).
  12. ↑ Xerox scan copiers change written numbers. D. Kriesel, accessed January 13, 2020 (blog).
  13. ↑ Find the difference. D. Kriesel, accessed January 13, 2020 (blog).
personal data
SURNAME Kriesel, David
BRIEF DESCRIPTION German computer scientist and data scientist
DATE OF BIRTH 1984
PLACE OF BIRTH Bonn