If you generated a wallet using Libbitcoin's Bitcoin Explorer, including as described in the appendix to Mastering Bitcoin, your funds are at risk (or already stolen). Full details: milksad.info/

Starting next week: VaNTAGe seminar series on isogeny-based cryptosystems sites.google.com/view/vantag…

Next version of Bouncy Castle will also include CRYSTALS-Kyber, CRYSTALS-Dilithium, Falcon, and other algorithms! It is available as beta right now at downloads.bouncycastle.org/b… 🎉. A great way to experiment (with care!) with the schemes being standardized by NIST.

In this preprint, in order to counter the Castryck-Decru attack (and derivatives), we suggest to use a fixed degree, but then mask only the torsion point information. How do we do that and why is this worth exploring? A thread! 1/n

Not bad

I just posted an updated and clarified version of my previous paper (which was too hastily written...) on breaking SIDH: eprint.iacr.org/2022/1038.pd…

It works!! Here's a @sagemath implementation of the SIDH Key Recovery attack of Castryck and Decru. Huge thanks to @oudomphe. Their insights allowed us to directly compute the image of points in the Jacobian through divisors. No Gröbner needed! github.com/jack4818/Castryck…

#ePrint An efficient key recovery attack on SIDH (preliminary version): W Castryck, T Decru ia.cr/2022/975

Congratulations to @meshcollider , who successfully defended his PhD thesis "Key Exchange and Zero-Knowledge Proofs from Isogenies and Hyperelliptic Curves" this morning.

On Thursday I am giving an online seminar on isogeny proofs of knowledge monash.edu/it/ssc/cybersecur…

This paper got less attention than I thought it would. Among its claims is that BIP32 (used extensively by Bitcoin but also many other blockchains) offers 91 bits of security. I always assumed some low n?<128, but not so low. Given BIP32 is a decade old it was overdue for review.

when reading text in a non-native language & wondering how it's pronounced, u can enter this in devtools to have the browser pronounce it: u=new SpeechSynthesisUtterance(getSelection().toString());u.lang='ru-RU';speechSynthesis.speak(u) (replace 'ru-RU' with any BCP 47 tag)

An alpha version of my coinswap project is released! lists.linuxfoundation.org/pi… Doesnt have all the features yet, but works on regtest, signet and mainnet Imagine a new privacy tech for bitcoin, like coinjoin, but cant be blocked b/c the txes look exactly the same as regular txes

PhD Thesis submitted✅🎉 Has been a great journey, thank you @EllipticKiwi for your excellent supervision! Now the wait for the examiners' reports begins 😎

Why are you idiots using TOOLS? JUST👏BE👏BETTER👏CODERS👏

#ePrint Breaking Rainbow Takes a Weekend on a Laptop: W Beullens ia.cr/2022/214