Samuel Dobson

PhD (mathematics) from @AucklandUni

[David A. Harding @hrdng]

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: https://t.co/Crlw63lUr4

[Samuel Dobson @meshcollider]

@asanso @treymaths 👀

[Samuel Dobson @meshcollider]

@durumcrustulum @EllipticKiwi Truly unmanageable 🤦

[Steven Galbraith @EllipticKiwi]

Starting next week: VaNTAGe seminar series on isogeny-based cryptosystems

https://t.co/jw7abQzf7D

[Tancrède Lepoint @Leptan]

Next version of Bouncy Castle will also include CRYSTALS-Kyber, CRYSTALS-Dilithium, Falcon, and other algorithms! It is available as beta right now at https://t.co/eCO9dydNrV 🎉. A great way to experiment (with care!) with the schemes being standardized by NIST.

[Tako Boris Fouotsa 🇨🇲 @FouotsaB]

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

[Deirdre Connolly¹ @durumcrustulum]

Not bad

[Damien Robert @GondoPloum]

I just posted an updated and clarified version of my previous paper (which was too hastily written...) on breaking SIDH: https://t.co/iAbgxjN5Kf

[Giacomo 🪿 @isogenies]

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!

https://t.co/yzBrTGP4sr

[IACR @IACR_News]

#ePrint An efficient key recovery attack on SIDH (preliminary version): W Castryck, T Decru https://t.co/2DAWdVYuNA

[Samuel Dobson @meshcollider]

@ThomasinLynch @EllipticKiwi Thanks Tammy!

And thanks again Steven 😊🎉

[Steven Galbraith @EllipticKiwi]

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

[Samuel Dobson @meshcollider]

@AnomalRoil @Cryptomaeher @mccurley r/whoosh

[Samuel Dobson @meshcollider]

@RobertSpigler @BenWestgate_ @RideTheBTC @JWWeatherman_ @heavilyarmedc The seed is used to derive keys. Descriptors tell you how to use those keys. They're independent but compatible

[Samuel Dobson @meshcollider]

@BenWestgate_ @RobertSpigler @RideTheBTC @JWWeatherman_ @heavilyarmedc I'm not sure this is something that will be *in* Core itself. Especially the sharing part. You can still kinda manually do this with Core right now - use shares to reconstruct a master seed, validate the checksum, then drop the checksum and import the seed with sethdseed RPC.

[Samuel Dobson @meshcollider]

@La__Cuen One key + one signature > multiple keys + multiple signatures

https://t.co/QXx4R5BqV2

[Samuel Dobson @meshcollider]

Successful twitter musig2 signing 🎉🚀

Musig2 is a cool protocol published (CRYPTO'21) by @n1ckler, @real_or_random, and Yannick Seurin.

It lets multiple parties combine their keys and sign messages/transactions with a single signature - indistinguishable from a single signer!