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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️

@xot@someone.elses.computer
  • Open on someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin.

Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

1390 Followers
626 Following
25 Posts
Joined July 02, 2023
Work:
https://www.cs.ru.nl/~jhh
Blog:
https://blog.xot.nl
Other:
https://www.xot.nl

Posts

Open post
xot
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Jun 28, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer

Today thirty years ago I defended my [PhD thesis](https://www.cs.ru.nl/~jhh/publications.html#thesis). A little more than a month before, my son was born. And five days after his birth my father died. Three life-changing events compressed in thirty nine days. That somehow triggered the journey that took me here, now, thirty years later. To this amazing state of being. I still cannot believe this all to be real.

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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · May 13, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @arjen@idf.social
@arjen@idf.social Ja nogal
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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · May 13, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer

Ah. Dus de AP dacht: wat Tata Steel kan kunnen wij ook 🤦

https://nos.nl/artikel/2614241-advocaat-van-tiktok-en-meta-wordt-voorzitter-privacywaakhond-ap

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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · May 05, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer

Mooi opiniestuk Jos Palm in NRC vandaag:
“Een cruciale eerste stap is in ieder geval de depolitisering van de Holocaust door het ondubbelzinnig veroordelen van de Israëlische oorlogsmisdaden door onze regering. Dat zou een mooi begin zijn, belangrijker voor de bestrijding van het groeiende antisemitisme dan de ongetwijfeld welgemeende zorgen die politici erover uitspreken.”

https://www.nrc.nl/nieuws/2026/05/04/israel-bombardeert-de-herinnering-aan-de-holocaust-kapot-a4926627?gift_token=4926627~1778567259~3lyNxDeAS72AhASGmidH-g~QqoPBOiXZpViR4xG3qpe8wt8bBbdWFpJqjHimP2ub38

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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 27, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @rene_mobile@infosec.exchange
@rene_mobile @stefan Indeed. See also my recent blog about exactly this issue https://blog.xot.nl/2026/04/09/online-age-assurance-raises-thorny-questions/index.html
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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 25, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @janvlug@mastodon.social
@janvlug @marleenstikker It is not entirely clear whether he was actually fired or referred on LinkedIn to a quote in newspaper Trouw that suggested he was fired. The newspaper later retracted that statement.
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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 22, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @xot@someone.elses.computer
Maar mogen we dezelfde aandacht dan ook verwachten voor het beschermen van de moslimgemeenschap? Want ook hun veiligheid wordt (zelfs door bepaalde volksvertegenwoordigers) bedreigt. Ik vind de eenzijdige aandacht voor de zorgen van de Joodse gemeenschap behoorlijk schrijnend, eerlijk gezegd.
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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 22, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer

Kabinet wil 7 ton uittrekken om "de Joodse gemeenschap nog beter [te] beschermen en het veiligheidsgevoel van Joden [te] versterken". Heel goed. Antisemitisme moet absoluut bestreden worden.

https://nos.nl/artikel/2611505-letschert-onder-vuur-om-aanpak-pro-palestinaprotest-op-universiteit-maastricht

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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 18, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @xot@someone.elses.computer
@Felienne @Radboud_uni Zoals de aankondiging van deze cursus https://www.ru.nl/en/radboud-into-languages/courses/write-smarter-with-generative-ai
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Open post
xot
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 18, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @dingemansemark@scholar.social
@Felienne Zeker! Maar als ik dan zie wat mijn eigen @Radboud_uni doet dan zinkt de moed me soms in de schoenen.
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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 18, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @dingemansemark@scholar.social
@Felienne @dingemansemark Als het deze kant op rolt zou dat heel heel mooi zijn…
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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 17, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @ronnylam@mastodon.social
@ronnylam@mastodon.social @Marloezovic@mastodon.nl Ik vrees het ergste: de app wordt er met grote haast doorgedrukt, omdat de commissie niet eens wil wachten op de echte Europese Identity Wallet - die juist al die benodigde features al/wel heeft.
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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 17, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer

European governments are getting WhatsApp and Signal out of their system:

https://www.politico.eu/article/european-civil-servants-new-messaging-services/

Sounds great. Until you realise that if politicians and officials get to use their own end-2-end encrypted communication app, there is very little stopping them from backdooring Signal and Whatsapp. Remember that state security risks were the main reason why Dutch intelligence opposed client side scanning!

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xot
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 17, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @Piratenpartij@mastodon.social
@Piratenpartij @Logius @stasdigi @huibmodderkolk Vreemd.. bij mij hangt onder deze toot een Zweedse toot uit 2016 (wat mij deed realiseren dat Mastodon inderdaad al zo oud is)
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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 16, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer

Privacy-adviseur BZK slaat alarm om overname DigiD | de Volkskrant https://digitalekrant.volkskrant.nl/volkskrant/2766/article/2494306/4/2/render/?token=b56656082a58573dcfef3947f3995fef

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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 14, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @isotopp@infosec.exchange
@isotopp@infosec.exchange @notjustbikes@social.notjustbikes.com Roughly corresponds to what I am seeing in my home, with a recent heat pump and 18 year old solar panels. No battery yet, but if we had, we would also not consume any power from the grid from mid April to early October.
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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 11, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @joepbc@mastodon.social
@joepbc Gemeente Groningen gaat in ieder geval van X af!
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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 09, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @badambassador@social.vivaldi.net
@badambassador Actually I specifically mention that there are in essence no privacy concerns with a wallet based approach, so no need to use age estimation (which DOES have privacy concerns for all the methods I am aware of.
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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Apr 09, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer

Online age assurance raises thorny questions. (And privacy is not really one of them.)

https://blog.xot.nl/2026/04/09/online-age-assurance-raises-thorny-questions/index.html

blog.xot.nl

Online age assurance raises thorny questions.

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xot
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Mar 28, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @Sascha@bonn.social
@Sascha@bonn.social @aerique@genart.social Thanks. Wasn’t aware that all Eurosky-PDS-users are limited by Blieskys rate limit, even when talking to each other. That’s a fundamental difference indeed.
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xot
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Mar 28, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @Sascha@bonn.social
@Sascha@bonn.social @aerique@genart.social But how is this different from AcrivityPub/Mastodon? If I am on a large instance A and want to reach members of another large instance B I need the cooperation of B too (it needs to federate with me), no?
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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Mar 27, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @joepbc@mastodon.social
@joepbc Adopt, adapt & improve!
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xot
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Mar 18, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @wearenew_public@mastodon.social
@wearenew_public Nice! And I agree with this advice: “the public sector should leverage its power as a major procurer to support alternatives to big tech” as well as “Double down on the enforcement of existing laws. Far from hindering innovation, regulation and laws provide crucial guardrails to guide innovation and ensure a level playing field.”
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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Feb 15, 2026
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @bjacobs@social.edu.nl
@bjacobs@social.edu.nl In this particular case, subsequent reporting could include a link to the original source hosted on the DoJ website, as proof of authenticity. But as you know, I'm not convinced that authenticity is an effective antidote to misinformation, see: https://ojs.weizenbaum-institut.de/index.php/wjds/article/view/5_4_3
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Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️ @xot@someone.elses.computer · Dec 17, 2025
Jaap-Henk Hoepman 🟥 ⬜️ 🟩 ⬛️
@xot@someone.elses.computer

Visiting Professor Karlstad University. Associate professor privacy enhancing protocols and privacy by design at Radboud University Nijmegen. Privacy Engineering Boffin. Author of "Privacy Is Hard and Seven Other Myths. Achieving Privacy through Careful Design."MIT Press, October 2021. https://mitpress.mit.edu/books/privacy-hard-and-seven-other-myths

someone.elses.computer
Replying to @djoerd@idf.social
@djoerd@idf.social @jesper@agda.club @jfdm@discuss.systems @peter_sewell_@types.pl @wilbowma@types.pl Me too. I used cryptpad.fr forms for collecting signatures.
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