Diego F. Aranha
@dfaranha.bsky.social
Associate Professor of Cryptographic Engineering at Aarhus University. https://dfaranha.github.io/
Reposted by Diego F. Aranha
I think it’s pretty clear at this point that one of the main impacts of LLMs is to disrupt thinking: to make it so that far too many people never properly learn how to do it, and then to control the output so there are thoughts that people never learn how to think.
November 24, 2025 at 5:18 PM
I think it’s pretty clear at this point that one of the main impacts of LLMs is to disrupt thinking: to make it so that far too many people never properly learn how to do it, and then to control the output so there are thoughts that people never learn how to think.
We got our security analysis of Letter Sealing v2 (latest E2EE protocol in the LINE messenger) accepted to Black Hat Europe. Full paper coming soon!
darkreading.com/application-security/line-messaging-bugs-asian-cyber-espionage
darkreading.com/application-security/line-messaging-bugs-asian-cyber-espionage
LINE Messaging Bugs Open Asian Users to Cyber Espionage
The encrypted messaging app uses a leaky custom protocol that allows message replays, impersonation attacks, and sensitive information exposure.
darkreading.com
November 24, 2025 at 4:38 PM
We got our security analysis of Letter Sealing v2 (latest E2EE protocol in the LINE messenger) accepted to Black Hat Europe. Full paper coming soon!
darkreading.com/application-security/line-messaging-bugs-asian-cyber-espionage
darkreading.com/application-security/line-messaging-bugs-asian-cyber-espionage
Reposted by Diego F. Aranha
My thoughts on the IACR election issue (since many have asked privately):
- This was an honest accident, and Moti Yung deserves being cut some slack. Yes, it’s a silly mistake, but mistakes happen.
- The IACR board reacted excellently and scheduled timely follow up elections.
Continued in thread
- This was an honest accident, and Moti Yung deserves being cut some slack. Yes, it’s a silly mistake, but mistakes happen.
- The IACR board reacted excellently and scheduled timely follow up elections.
Continued in thread
November 23, 2025 at 12:53 PM
My thoughts on the IACR election issue (since many have asked privately):
- This was an honest accident, and Moti Yung deserves being cut some slack. Yes, it’s a silly mistake, but mistakes happen.
- The IACR board reacted excellently and scheduled timely follow up elections.
Continued in thread
- This was an honest accident, and Moti Yung deserves being cut some slack. Yes, it’s a silly mistake, but mistakes happen.
- The IACR board reacted excellently and scheduled timely follow up elections.
Continued in thread
Reposted by Diego F. Aranha
Against ‘chat control’: we can’t eliminate child abuse by eliminating privacy
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
www.theguardian.com
October 13, 2025 at 12:44 PM
Against ‘chat control’: we can’t eliminate child abuse by eliminating privacy
Reposted by Diego F. Aranha
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.
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
media.tenor.com
October 15, 2025 at 3:12 PM
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.
Reposted by Diego F. Aranha
"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
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
www.theguardian.com
October 14, 2025 at 5:00 PM
"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
Reposted by Diego F. Aranha
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
🛰️ SATCOM Security
Research project homepage for SATCOM Security: papers, source code, and recent satellite communications vulnerabilities.
satcom.sysnet.ucsd.edu
October 14, 2025 at 1:16 AM
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
Reposted by Diego F. Aranha
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.
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.
October 12, 2025 at 11:30 PM
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.
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.
Reposted by Diego F. Aranha
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.
October 10, 2025 at 11:36 AM
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.
Reposted by Diego F. Aranha
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.
October 7, 2025 at 8:20 PM
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.
Reposted by Diego F. Aranha
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.
Nick Clegg says asking artists for use permission would ‘kill’ the AI industry
Nick Clegg says asking artists for use permission would ‘kill’ the AI industry
Paul McCartne, Elton John and others signed an open letter.
buff.ly
October 8, 2025 at 10:29 AM
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.
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.
October 6, 2025 at 3:52 PM
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.
Reposted by Diego F. Aranha
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...
signal.org
October 3, 2025 at 4:14 PM
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...
Sounds just like the Justice Minister of Denmark, who is pushing Chat Control with a crime-free society narrative.
bsky.app/profile/robe...
bsky.app/profile/robe...
Larry Ellison envisions a surveillance state in which techbros rule. '“Citizens will be on their best behavior, because we’re constantly recording and reporting everything that is going on,” Ellison said in an hour-long Q&A during Oracle’s Financial Analyst Meeting last week.'
Larry Ellison predicts rise of the modern surveillance state where ‘citizens will be on their best behavior’ | Fortune
Oracle's Larry Ellison believes citizens and police alike will be under constant surveillance of each other.
fortune.com
September 29, 2025 at 5:28 AM
Sounds just like the Justice Minister of Denmark, who is pushing Chat Control with a crime-free society narrative.
bsky.app/profile/robe...
bsky.app/profile/robe...
Reposted by Diego F. Aranha
<<“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
September 27, 2025 at 6:15 PM
<<“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
Reposted by Diego F. Aranha
"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
Good news: There is still time to fight back!"
Shut this monstrosity down NOW
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 ...
www.privacyguides.org
September 23, 2025 at 7:23 PM
"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
Good news: There is still time to fight back!"
Shut this monstrosity down NOW
Reposted by Diego F. Aranha
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.
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 […]
cdt.org
September 18, 2025 at 7:30 PM
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.
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!
menezesfest.info
If you're coming to Medellín, consider attending!
MenezesFest 2025
MenezesFest brings together researchers, colleagues, and friends to celebrate the career and impact of Alfred Menezes.
menezesfest.info
September 18, 2025 at 6:17 AM
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!
menezesfest.info
If you're coming to Medellín, consider attending!
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...
bsky.app/profile/matt...
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?
September 17, 2025 at 11:06 PM
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...
bsky.app/profile/matt...
Reposted by Diego F. Aranha
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?
September 17, 2025 at 5:10 PM
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?
Reposted by Diego F. Aranha
Burn it with fire
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
www.techradar.com
September 11, 2025 at 8:08 PM
Burn it with fire
Reposted by Diego F. Aranha
Brazil bluesky today:
September 11, 2025 at 9:38 PM
Brazil bluesky today:
Reposted by Diego F. Aranha
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."
"No one would ever do that, it's illegal."
This is a serious breach of privacy. Yet employee records have limited protection under federal privacy law. We urgently need legal change to better protect employee privacy.
dx.doi.org/10.2139/ssrn...
dx.doi.org/10.2139/ssrn...
September 10, 2025 at 8:05 AM
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."
"No one would ever do that, it's illegal."
Reposted by Diego F. Aranha
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
csa-scientist-open-letter.org/Sep2025
csa-scientist-open-letter.org
September 9, 2025 at 11:11 AM
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
csa-scientist-open-letter.org/Sep2025
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
csa-scientist-open-letter.org/Sep2025
csa-scientist-open-letter.org
September 9, 2025 at 11:24 AM
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
csa-scientist-open-letter.org/Sep2025