RT @code4rena: Code4rena will run audit contests for free, as public goods. 100% of funds from sponsors will go directly to auditors and j….

4/ Many thanks to @yuval_domb, @kobigurk, @GuilleAngeris, and @nico_mnbl for their valuable feedback and comments!.

3/ Most existing literature does not clearly bridge theory and code. I aim to fill this gap with this writeup. Readers will gain a strong working intuition behind regular Montgomery multiplication and Logjumps. This may pave the way to new improvements and optimisations.

2/ Intrigued, I wrote a research note to help cryptography engineers deeply understand both techniques:

1/ Earlier this year, @yuval_domb discovered Logjumps — a more efficient way to do large-prime field multiplication than Montgomery multiplication. So much modern crypto relies on modular multiplication — all the way from TLS sessions to elliptic-curve based ZK proofs.

RT @sweis: Happy Curve25519 day to all who celebrate.

RT @wyatt_benno: We are proud to open-source a high-performance MSM for BN254 curve in WebGPU. It runs on Windows, macOS, AMD chips, many….

RT @alexhevans: The Accidental Computer with @GuilleAngeris on prover acceleration via DA encodings. In short, proofs-of-encoding (such as….

TL;DR: You can easily derive ETH addresses from Bluesky PDS public keys, but it's really important to check who really controls those keys before sending funds. If the user isn’t self-hosting their PDS, any crypto you send will be held by Bluesky PBC, not them.

Remember these trust assumptions:. - The @bluesky API must return the correct DID for a handle.- The DID PLC Directory must return the correct repo data. If either fails, your belief about who truly owns that ETH address may be wrong.

Self-hosting your own PDS? You can import your PDS key into an ETH wallet. Navigate to /pds/actors/. /<your DID>/, then run:. python -c "print(open('./key', 'rb').read().hex())". That’s your private key, in hex.

How it works:. Each Bluesky handle is associated with a decentralised identifier (DID). Each DID points to a PDS, which advertises a public key. Decode it to get a 33-byte key, decompress it to 64 bytes, Keccak-hash it, and keep the last 20 bytes. Voilà: an ETH address!.

I built a quick web app to fetch a Bluesky handle’s public key and convert it into an ETH address. Check it out here:.

⚠️ Warning: Most Bluesky users rely on PDSes run by @bluesky, who ultimately control those private keys! So if you send funds to addresses derived from those public keys, only Bluesky PBC can access them — not necessarily the user.

Want to send crypto to Bluesky users? It's possible!. Their keypairs are for the secp256k1 curve, which Ethereum also uses. That means you can derive an ETH address from their publicly accessible signing keys.

RT @PrivacyScaling: Cross-posting from the @zkmopro blog: @vivi4322 on performance comparisons of various circom provers for mobile proving….

RT @PrivacyScaling: New post from PSE's Trusted Setup team: a retrospective on development of trusted setup tools including Perpetual Power….

RT @sayashk: More than 60 countries held elections this year. Many researchers and journalists claimed AI misinformation would destabilize….

Read on to learn more:

The first in a series of posts focused on client-side proving, this research note will be useful to applied cryptographers keen to push privacy-focused ZK forward. Many thanks to @GuilleAngeris, @alexhevans, @MariusMargulus, and @kobigurk for their valuable feedback.