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thijsniks's profile
Thijs Niks
Thijs Niks
Thijs Niks
@thijsniks

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Thijs Niks

@thijsniks

Product Manager for ☎️ at @WhatsApp / ❤️ retweets

San Francisco, CA
thijs.niks.nu
Joined February 2009

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    1. Jasper van Kuijk‏Verified account @jaspervankuijk Mar 27

      Mijn 'Hoe moeilijk kan het zijn?' van deze week. Dat deepfakes steeds echter en makkelijker worden bedreigt de geloofwaardigheid van video's. Echtheidscertificaten op basis van - jawel! - de blockchain zouden kunnen helpen. https://www.volkskrant.nl/wetenschap/wapen-in-de-strijd-tegen-deepfakevideo-s-een-echtheidscertificaat~b1a6e3d5/ … #HMKHZ via de @volkskrant

      7 replies 10 retweets 23 likes
    2. Thijs Niks‏ @thijsniks Mar 28
      Replying to @jaspervankuijk

      Wat voegt de blockchain toe als je ook DNS kunt gebruiken?

      1 reply 0 retweets 0 likes
    3. Jasper van Kuijk‏Verified account @jaspervankuijk Mar 28
      Replying to @thijsniks

      Hoe bedoel je?

      1 reply 0 retweets 0 likes
    4. Thijs Niks‏ @thijsniks Mar 28
      Replying to @jaspervankuijk

      De verificatie gebeurt door een cryptografische vingerafdruk van het bestand te vergelijken met een registratie in een betrouwbare databank. Elke camerafabrikant kan daarvoor haar eigen databank hosten, of gebruik maken van een centrale service die dat voor ze doet.

      1 reply 0 retweets 0 likes
    5. Jasper van Kuijk‏Verified account @jaspervankuijk Mar 28
      Replying to @thijsniks

      Klopt, maar het idee van een blockchain is dan dat de betrouwbaarheid wordt vergroot doordat de ledger gedistribueerd en publiek is. Truepic en Amber Authenticate maken iig allebei gebruik van blockchain.

      1 reply 0 retweets 0 likes
    6. Thijs Niks‏ @thijsniks Mar 28
      Replying to @jaspervankuijk

      Ik zie enkel niet welk technisch aspect van de blockchain het vertrouwen zou vergroten

      2 replies 0 retweets 0 likes
    7. Sherif Hanna‏ @sherifhanna Mar 28
      Replying to @thijsniks @jaspervankuijk

      We are moving away from blockchain and relying instead on PKI. If you look at the lower part of our Technology page, it explains how are next generation tech works (and also the work we did with Qualcomm to embed it directly in smartphone chipsets)

      1 reply 0 retweets 2 likes
    8. Thijs Niks‏ @thijsniks Mar 28
      Replying to @sherifhanna @jaspervankuijk

      PKI makes a lot of sense to me. What was the reason to move away from the blockchain?

      1 reply 0 retweets 1 like
    9. Sherif Hanna‏ @sherifhanna Mar 28
      Replying to @thijsniks @jaspervankuijk

      (1) Poor scalability w.r.t write throughput (2) Needs vendor to keep a record of where on ledger the protective hash is; if operator goes out of business, the hash is lost forever (3) needs real time read of ledger upon display or worse wholesale replication of ever-larger ledger

      1 reply 0 retweets 2 likes
    10. Sherif Hanna‏ @sherifhanna Mar 28
      Replying to @sherifhanna @thijsniks @jaspervankuijk

      PKI is superior in almost every way. (1) Issuing of certs for signing keys highly scalable (2) Protective hash is part of digital signature embedded in the file; no need to lookup the protective hash using some kind of intermediary (3) Verification possible without server call

      1 reply 0 retweets 2 likes
      Thijs Niks‏ @thijsniks Mar 28
      Replying to @sherifhanna @jaspervankuijk

      Thank you for the detailed comparison! Super valid reasons. Really appreciate it

      11:38 AM - 28 Mar 2021
      • 3 Likes
      • Richard Jong Sherif Hanna Jasper van Kuijk
      2 replies 0 retweets 3 likes
        1. Jasper van Kuijk‏Verified account @jaspervankuijk Mar 28
          Replying to @thijsniks @sherifhanna

          Thanks indeed. Makes sense. And good luck.

          0 replies 0 retweets 1 like
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        2. Sherif Hanna‏ @sherifhanna Mar 28
          Replying to @thijsniks @jaspervankuijk

          You're very welcome. We really tried to think of what it would take to make authenticatable photos/videos suitable for adoption in massive scale platforms like WhatsApp, FB, Twitter etc. These ideas are now forming foundation of C2PA open standard (http://C2PA.org )

          1 reply 0 retweets 1 like
        3. Sherif Hanna‏ @sherifhanna Mar 28
          Replying to @sherifhanna @thijsniks @jaspervankuijk

          Would love to have you participate is shaping the standard! Please let me know if you'd be interested in participating in the C2PA.

          0 replies 0 retweets 0 likes
        4. End of conversation

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