Diego F. Aranha's Avatar

Diego F. Aranha

@dfaranha.bsky.social

Associate Professor of Cryptographic Engineering at Aarhus University. https://dfaranha.github.io/

730 Followers  |  527 Following  |  149 Posts  |  Joined: 12.10.2023  |  1.9379

Latest posts by dfaranha.bsky.social on Bluesky

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Against ‘chat control’: we can’t eliminate child abuse by eliminating privacy Banning online anonymity tools like Tor won’t stop crime. It will only drive people underground and normalize government control over the internet

Against ‘chat control’: we can’t eliminate child abuse by eliminating privacy

13.10.2025 12:44 — 👍 66    🔁 23    💬 4    📌 1
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a woman in a purple sweater says they are the same picture ALT: a woman in a purple sweater says they are the same picture

The “age verification” and the “human identification” problem are the same problem. It upsets me to be around people who think they’re working on the first, but don’t understand they’re actually working on the second.

15.10.2025 15:12 — 👍 111    🔁 32    💬 3    📌 3
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Against ‘chat control’: we can’t eliminate child abuse by eliminating privacy Banning online anonymity tools like Tor won’t stop crime. It will only drive people underground and normalize government control over the internet

"Governments across the world are expanding surveillance, weakening encryption, and curtailing freedoms under the guise of staunching the proliferation of sexual images and videos of children" https://www.theguardian.com/commentisfree/2025/oct/13/chat-control-child-abuse-internet-privacy #Privacy

14.10.2025 17:00 — 👍 6    🔁 6    💬 0    📌 0
🛰️ SATCOM Security Research project homepage for SATCOM Security: papers, source code, and recent satellite communications vulnerabilities.

This is amazing research by Nadia Heninger and her co-authors Wenyi Morty Zhang, Annie Dai, Keegan Ryan, Dave Levin and Aaron Schulman. TL;DR a huge number of satellite links over our heads are totally unencrypted. satcom.sysnet.ucsd.edu

14.10.2025 01:16 — 👍 144    🔁 67    💬 5    📌 8

The 400 richest Americans are now worth a record $6.6 trillion.

The entire bottom 50% of America is worth just $4.2 trillion.

Read that back.

When 400 people control more wealth than half a country’s population, we have a very serious problem.

12.10.2025 23:30 — 👍 24229    🔁 9161    💬 804    📌 425

Germany has agreed to stop ChatControl for now, due to huge amounts of public pressure. Good job! The bad news is that it could come back as soon as December, and the German government has interpreted the feedback as a need to “moderate” the proposal.

10.10.2025 11:36 — 👍 147    🔁 46    💬 1    📌 1

I hear that the EU ChatControl situation is going better today. I cannot believe how close the EU has gotten to passing this crazy regulation.

07.10.2025 20:20 — 👍 45    🔁 11    💬 5    📌 1
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One-man spam campaign ravages EU ‘chat control’ bill A software developer from Denmark is having an outsized influence on a hotly debated law to break open encrypted apps.

This dude is a hero: www.politico.eu/article/one-...

08.10.2025 19:17 — 👍 2    🔁 0    💬 0    📌 0

Today is a day when arts degrees are worthless, but the product of those degrees is so valuable it would kill an entire industry if they were made to pay for it.

08.10.2025 10:29 — 👍 26625    🔁 10119    💬 427    📌 185

You're a much better person than me, Dan :)

07.10.2025 11:38 — 👍 1    🔁 0    💬 1    📌 0

Someone please make me understand how Denmark can be at the same time freaking out about hybrid war with Russia AND pushing for government-mandated spyware as Chat Control.

06.10.2025 15:52 — 👍 9    🔁 2    💬 1    📌 0

We are alarmed by reports that Germany is on the verge of a catastrophic about-face, reversing its longstanding and principled opposition to the EU’s Chat Control proposal which, if passed, could spell the end of the right to privacy in Europe. signal.org/blog/pdfs/ge...

03.10.2025 16:14 — 👍 3998    🔁 2432    💬 41    📌 147

Sounds just like the Justice Minister of Denmark, who is pushing Chat Control with a crime-free society narrative.

bsky.app/profile/robe...

29.09.2025 05:28 — 👍 4    🔁 0    💬 0    📌 0

<<“brain gain” is exactly what we have experienced. As Danish companies have succeeded globally, they have sought out the best and brightest in their respective fields from across the world. The number of foreign workers in Copenhagen has more than doubled in the last decade.>> @madshvid.bsky.social

27.09.2025 18:15 — 👍 5    🔁 1    💬 1    📌 1
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The battle to stop Chat Control continues, act now! Unfortunately, the battle against Chat Control continues this month. For human rights, for civil liberties, for safety, and for democracy, this privacy-wrecking proposal must be stopped. We need your ...

"Bad news: The proposal is going forward to be voted on on October 14th, and there's still no blocking minority achieved, as Germany reverted its position to undecided.

Good news: There is still time to fight back!"

Shut this monstrosity down NOW

23.09.2025 19:23 — 👍 11    🔁 10    💬 0    📌 0

Eu li podosfera errado e bateu uma tristeza profunda repentina :(

23.09.2025 13:14 — 👍 1    🔁 0    💬 0    📌 0
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Canada’s Strong Borders Act Threatens Strong Encryption On September 15, 2025, CDT joined civil society organizations, companies, and cybersecurity experts, including members of the Global Encryption Coalition, to urge the Canadian government to withdraw Bill C-2, the so-called Strong Borders Act. Parts 14 and 15 of the bill would grant broad powers to compel backdoors into encrypted services and expand warrantless access […]

Earlier this week, CDT joined civil society orgs, companies, & cybersecurity experts, including members of the @globalencryption.org, to urge the Canadian government to withdraw Bill C-2, the so-called Strong Borders Act.

18.09.2025 19:30 — 👍 3    🔁 2    💬 1    📌 0
MenezesFest 2025 MenezesFest brings together researchers, colleagues, and friends to celebrate the career and impact of Alfred Menezes.

The impact of Alfred Menezes in cryptography is profound. Francisco RH and I are organizing an afternoon session in Latincrypt to celebrate Alfred's career:

menezesfest.info

If you're coming to Medellín, consider attending!

18.09.2025 06:17 — 👍 12    🔁 6    💬 1    📌 0

Oh damn, let me repost.

18.09.2025 06:16 — 👍 0    🔁 0    💬 1    📌 0

If ChatControl needs national security exemptions to *not* weaken the security of the state, what makes one believe that it will *not* weaken the security of everyone else?

bsky.app/profile/matt...

17.09.2025 23:06 — 👍 5    🔁 1    💬 0    📌 0

I know it’s been said again and again, but what does it say about ChatControl that its backers keep explicitly *exempting* law enforcement and national security accounts from content scanning?

17.09.2025 17:10 — 👍 96    🔁 40    💬 3    📌 8
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The EU has never been closer to agreeing on Chat Control – here's how we got here and what’s at stake The Danish version of Chat Control is thought to have the best chances of becoming law since 2022

Burn it with fire

11.09.2025 20:08 — 👍 12    🔁 6    💬 0    📌 0
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Brazil bluesky today:

11.09.2025 21:38 — 👍 2750    🔁 899    💬 8    📌 37

I'm sympathetic, but I do think it is charming how teh lawyerz believe that you can legislate your way out of a threat model.

"No one would ever do that, it's illegal."

10.09.2025 08:05 — 👍 5    🔁 3    💬 0    📌 0

The EU Parliament has published a new proposal for Chat Control to mass-surveil all digital communication in Europe. The proposal is ineffective, weakens secure communication, and violates basic human privacy. This must be stopped immediately. #ChatControl
csa-scientist-open-letter.org/Sep2025

09.09.2025 11:11 — 👍 23    🔁 14    💬 1    📌 2

The EU wants to spend your money to assemble a giant mass surveillance machine with little effect on harm against children. Chat Control is not effective, weakens security for all and does not respect privacy. Contact your EU representatives and let them know.

csa-scientist-open-letter.org/Sep2025

09.09.2025 11:24 — 👍 20    🔁 10    💬 0    📌 0

More than 500 researchers have signed an open letter against the dangerous EU proposal on chat control.

The proposal remains ineffective, undoes decades of results in E2E encryption, and threatens the privacy of half a billion citizens.

csa-scientist-open-letter.org/Sep2025

09.09.2025 10:40 — 👍 15    🔁 12    💬 1    📌 0

It was too late when I figured out this was not about cryptography.
bsky.app/profile/arju...

07.09.2025 11:15 — 👍 4    🔁 0    💬 1    📌 0

Até porque quem está decidindo sobre a implantação são os próprios governos, que nunca vão admitir poderem ser maliciosos. De qualquer forma, nem a versão honesta funciona porque a taxa de falsos positivos é proibitiva.

04.09.2025 18:32 — 👍 1    🔁 0    💬 1    📌 0
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a man in a suit and tie is sitting in a chair and laughing with the word ecziste behind him . ALT: a man in a suit and tie is sitting in a chair and laughing with the word ecziste behind him .
04.09.2025 16:49 — 👍 1    🔁 0    💬 0    📌 0

@dfaranha is following 20 prominent accounts