Fredrik Dahlgren
@fegge.bsky.social
260 followers 260 following 94 posts
Cryptography and static analysis @ Trail of Bits
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Reposted by Fredrik Dahlgren
Reposted by Fredrik Dahlgren
Geostationary satellites are leaking critical data, transmitting sensitive communications in the clear. With just $800 of consumer hardware, researchers intercepted military, telecom, retail, and infrastructure traffic. satcom.sysnet.ucsd.edu/docs/dontloo...
Reposted by Fredrik Dahlgren
Vad bra Moderaterna mår. (Återigen: Underlaget jag skriver utifrån är alltså officiell SCB-statistik!)
Reposted by Fredrik Dahlgren
Påminnelse. År 2025 lever 700 000 människor i materiell och social fattigdom i Sverige. Det är en ökning med 120 000 på ett år. Bara sedan 2021 har andelen fattiga nästan fördubblats, från 3,5% till 6,6%. Ojämlikheten skenar

www.dagensarena.se/innehall/fat...
Fattigdomen fördubblad i Sverige på tre år | Dagens Arena
Andelen fattiga i Sverige har fördubblats sedan 2021 och är nu nära 7 procent av befolkningen. 700 000 personer klarar inte att betala nödvändiga utgifter.
www.dagensarena.se
Jag försökte bli månadsgivare till en organisation jag stödjer, men för att godkänna autogirot var jag tvungen att ge något som heter FinShark tillgång till mitt konto i 180 dagar!? Det känns ju helt bananas! Är det här verkligen det bästa vi kan åstadkomma 2025?
Reposted by Fredrik Dahlgren
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
This is so cursed.
Virtual Machines render fonts. It’s kind of insane.



TrueType has its own instruction set, memory stack, and function calls.



You can debug it like assembly. It’s also exploitable:
I really recommend reading the blog post though. It goes into detail on some of the engineering and security considerations that went into the design, as well as how the rollout is handled.
The triple ratchet extends the double ratchet with a second, sparse post-quantum ratchet called SPQR. SPQR is based on a chunked version of ML-KEM 768. The outputs from both are passed to a KDF to form a hybrid KEM.
Signal is really pushing the envelope with their new post-quantum secure triple ratchet. The protocol is formally verified using ProVerif, and the implementation uses hax to verify correctness and panic-freeness of the implementation. Really great work!
In 2023, Signal was the first mainstream messenger to enable post-quantum cryptography. We’re still ahead of the (elliptical) curve, implementing a new hybrid PQ ratchet ensuring Forward Secrecy & Post-Compromise Security even in a post-quantum world. signal.org/blog/spqr/
Signal Protocol and Post-Quantum Ratchets
We are excited to announce a significant advancement in the security of the Signal Protocol: the introduction of the Sparse Post Quantum Ratchet (SPQR). This new ratchet enhances the Signal Protocol’s...
signal.org
This gives a whole new meaning to APT.
Excel is Turing complete. Just sayin.
Reposted by Fredrik Dahlgren
Fan ta svenska folket om de inte röstar bort de brunblå om ett år.
In the EU (Sweden) we (and Google) are apparently still not wholly convinced.
Reposted by Fredrik Dahlgren
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 Fredrik Dahlgren
I’m Not a Robot, a game about solving CAPTCHAs, is out now!

good luck :)

> neal.fun/not-a-robot/
Reposted by Fredrik Dahlgren
TIL that setting LESSSECURE makes you more secure
Great paper on finding and exploiting parser differentials between ZIP parsers to bypass signature validation, malware detection, or VSCode extension ID validation.

www.usenix.org/conference/u...
Reposted by Fredrik Dahlgren
netspooky @vacci.ne · Sep 13
There's a sick linenoise article by @there.is.no.aarch64.mov in @phrack.org 71 called "Learning An ISA By Force Of Will", where ixi goes from unknown binary blob, to manual instruction decoding, to figuring out control flow, and gives a critique of the RE'd ISA.

phrack.org/issues/71/3#...
Reposted by Fredrik Dahlgren
Study Finds Health Benefits Associated With Seriously Considering Going Vegetarian For A While Now https://theonion.com/study-finds-health-benefits-associated-with-seriously-c-1819579558/