Nils Fleischhacker
@cryptomaeher.bsky.social
Cryptographer working on both applied and theoretical cryptography. Currently Assistant Professor for Cryptography at Ruhr University Bochum. Opinions probably someone else's. he/him
Reposted by Nils Fleischhacker
Liebe Medien, ich kann die Schlagzeile "Keine Einigung zwischen USA und Dänemark" nicht mehr sehen. Wenn ein Bewaffneter eine Bank stürmt, titelt ihr doch auch nicht: "Räuber und Kassiererin finden keinen Konsens über Geldübergabe." Hört auf, imperiale Aggression als normale Diplomatie zu framen.
January 15, 2026 at 10:44 AM
Liebe Medien, ich kann die Schlagzeile "Keine Einigung zwischen USA und Dänemark" nicht mehr sehen. Wenn ein Bewaffneter eine Bank stürmt, titelt ihr doch auch nicht: "Räuber und Kassiererin finden keinen Konsens über Geldübergabe." Hört auf, imperiale Aggression als normale Diplomatie zu framen.
The Bundeswehr always deploys in baker's dozens.
January 14, 2026 at 7:56 PM
The Bundeswehr always deploys in baker's dozens.
I'm genuinely curious what the point of this is? Citeability of the eprint version?
Zero Knowledge (About) Encryption: A Comparative Security Analysis of Three Cloud-based Password Managers (Matteo Scarlata, Giovanni Torrisi, Matilda Backendal, Kenneth G. Paterson) ia.cr/2026/058
January 14, 2026 at 7:30 PM
I'm genuinely curious what the point of this is? Citeability of the eprint version?
Any self-respecting religion should have a vesting period.
January 13, 2026 at 5:39 PM
Any self-respecting religion should have a vesting period.
Reposted by Nils Fleischhacker
So a question for people working on subways? Construction? My daughter wants to know what these scribbles on the wall of the subway tunnel shortly before Essen Main Station, approaching from the south might mean.
January 13, 2026 at 7:09 AM
So a question for people working on subways? Construction? My daughter wants to know what these scribbles on the wall of the subway tunnel shortly before Essen Main Station, approaching from the south might mean.
So a question for people working on subways? Construction? My daughter wants to know what these scribbles on the wall of the subway tunnel shortly before Essen Main Station, approaching from the south might mean.
January 13, 2026 at 7:09 AM
So a question for people working on subways? Construction? My daughter wants to know what these scribbles on the wall of the subway tunnel shortly before Essen Main Station, approaching from the south might mean.
Pondering time's up.
January 12, 2026 at 6:14 AM
Pondering time's up.
Apparently Lego at some point shittified their cables. The ones from the early nineties are perfectly fine. The ones from the late nineties look like this.
January 10, 2026 at 4:24 PM
Apparently Lego at some point shittified their cables. The ones from the early nineties are perfectly fine. The ones from the late nineties look like this.
I get that this is funny for obvious reasons. But it also misstates the basis for Denmark's claim. The claim's dubious for funny historical reasons, but it's not based on "a boat landing 500 years ago". It's based on settlements established over 1000 years ago on an uninhabited Island.
Trump talks about Denmark and Greenland just now: "The fact that they landed a boat there 500 years ago doesn't mean that they own the land."
January 10, 2026 at 11:18 AM
I get that this is funny for obvious reasons. But it also misstates the basis for Denmark's claim. The claim's dubious for funny historical reasons, but it's not based on "a boat landing 500 years ago". It's based on settlements established over 1000 years ago on an uninhabited Island.
According to the map maintained by our robot vacuum, our shower (which it has never entered and cannot physically enter) is carpeted. And I don't know what to do with that information.
January 7, 2026 at 9:45 AM
According to the map maintained by our robot vacuum, our shower (which it has never entered and cannot physically enter) is carpeted. And I don't know what to do with that information.
It says a lot about the US that most Americans on here seem much more concerned that their president didn't ask permission than with the fact that they just kidnapped a foreign head of state and bombed a bunch of civilians for the lulz.
January 3, 2026 at 3:21 PM
It says a lot about the US that most Americans on here seem much more concerned that their president didn't ask permission than with the fact that they just kidnapped a foreign head of state and bombed a bunch of civilians for the lulz.
Sanction the US now.
January 3, 2026 at 10:09 AM
Sanction the US now.
Me, obviously being ridiculous: Sometimes it would help if you told us what the problem is.
The 4 year old, looking deadly serious: No.
The 4 year old, looking deadly serious: No.
January 1, 2026 at 6:02 PM
Me, obviously being ridiculous: Sometimes it would help if you told us what the problem is.
The 4 year old, looking deadly serious: No.
The 4 year old, looking deadly serious: No.
Having your dog off leash should be punishable by getting mauled by dogs. Maybe then people would learn.
December 23, 2025 at 8:41 AM
Having your dog off leash should be punishable by getting mauled by dogs. Maybe then people would learn.
How is mince meat but mincemeat is fruit? The Brits truly should never have been allowed to have a language.
December 18, 2025 at 4:34 PM
How is mince meat but mincemeat is fruit? The Brits truly should never have been allowed to have a language.
Reposted by Nils Fleischhacker
We could stop having any relevant conference in the US until the rule of law is reinstated, please.
Can we stop having most big hacker conferences in the U.S. please, as only people who support Trump publicly will be allowed into the country from overseas.
Requiring temporary visitors to surrender five years of social media to the U.S. sends the message that the American commitment to free speech is pretense. This simply is not the behavior of a country confident in its freedoms.
It's a threat to free speech around the world and must be opposed.
It's a threat to free speech around the world and must be opposed.
December 10, 2025 at 5:33 PM
We could stop having any relevant conference in the US until the rule of law is reinstated, please.
I guess technically the EC chairs only promised that the reviews would be available (roughly) 24 hours after the first email. They never said for how long. 🤷♂️
My condolences to anyone who didn't immediately check.
My condolences to anyone who didn't immediately check.
December 10, 2025 at 12:21 PM
I guess technically the EC chairs only promised that the reviews would be available (roughly) 24 hours after the first email. They never said for how long. 🤷♂️
My condolences to anyone who didn't immediately check.
My condolences to anyone who didn't immediately check.
If you want to give out swag I'll actually use/wear, the answer is always socks.
December 10, 2025 at 7:50 AM
If you want to give out swag I'll actually use/wear, the answer is always socks.
The authors are delighted to inform you that they have chosen to send a rebuttal to your review.
The rebuttal to your review will be available in 24 hours.
The rebuttal to your review will be available in 24 hours.
December 9, 2025 at 8:50 AM
The authors are delighted to inform you that they have chosen to send a rebuttal to your review.
The rebuttal to your review will be available in 24 hours.
The rebuttal to your review will be available in 24 hours.
Reposted by Nils Fleischhacker
Interested in the security of MPC implementations?
Peter Scholl (@schollster.bsky.social) and I are looking for research interns to study the theory/practice gap for MPC. We can host multiple interns in Aarhus for the summer 2026.
More information: mpcinthewild.github.io
Help us spread the word!
Peter Scholl (@schollster.bsky.social) and I are looking for research interns to study the theory/practice gap for MPC. We can host multiple interns in Aarhus for the summer 2026.
More information: mpcinthewild.github.io
Help us spread the word!
MPC in the Wild is a research project that aims to study the real-world implementation security of MPC protocols, in particular, the gap between assumptions on the theory side and implementation choices made in practice.
mpcinthewild.github.io
December 6, 2025 at 4:21 PM
Interested in the security of MPC implementations?
Peter Scholl (@schollster.bsky.social) and I are looking for research interns to study the theory/practice gap for MPC. We can host multiple interns in Aarhus for the summer 2026.
More information: mpcinthewild.github.io
Help us spread the word!
Peter Scholl (@schollster.bsky.social) and I are looking for research interns to study the theory/practice gap for MPC. We can host multiple interns in Aarhus for the summer 2026.
More information: mpcinthewild.github.io
Help us spread the word!
Wtf is wrong with people? Why is this train full? Who takes the train on Sunday morning? Off to new adventures I guess.
December 7, 2025 at 7:28 AM
Wtf is wrong with people? Why is this train full? Who takes the train on Sunday morning? Off to new adventures I guess.
The most essential part to buying anything in Denmark is pretending that you don't know what the exchange rate is.
November 29, 2025 at 2:38 PM
The most essential part to buying anything in Denmark is pretending that you don't know what the exchange rate is.
Reposted by Nils Fleischhacker
I'm now on the 5th train of this 3 train journey.
November 28, 2025 at 3:56 PM
I'm now on the 5th train of this 3 train journey.
Reposted by Nils Fleischhacker
Dear Denmark, your persistent contravention of the Schengen agreement makes me sad. Please stop making me sad.
November 28, 2025 at 11:50 AM
Dear Denmark, your persistent contravention of the Schengen agreement makes me sad. Please stop making me sad.
On my way to Aarhus. We'll see what delightful adventures the rail system has in store for us today.
November 28, 2025 at 5:45 AM
On my way to Aarhus. We'll see what delightful adventures the rail system has in store for us today.