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Dmytro Zakharov
@ZamDmytro
Applied Cryptography at @Blockstream
156 Following    395 Followers
I'm glad to share that our book on zero-knowledge protocols now has a full chapter on post-quantum zero-knowledge proving systems with over 100 pages! It covers lattice-based Σ-protocols, LaBRADOR, and ZK-STARKs, with all the necessary prerequisites included. Link below 👇
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Glad to be part of our lattice-based cryptography team! :) If you've ever wanted to learn lattice-based signatures from scratch, make sure to read the paper. In addition to Dilithium, Falcon, and HAWK, we also described BLISS, the Gärtner scheme, and a recent attack on HAWK.
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In case you want a gentle introduction to one of the key paradigms behind lattice-based signatures (Fiat-Shamir with Aborts), make sure to read our latest blog:
A written version of my recent @OPNEXT2026 talk, with extra details and references. It covers SHRINCS/SHRIMPS, the design space of post-quantum signatures for Bitcoin (especially hash-based ones), and a toy proposal for OP_CHECKSPHINCS.
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Our newest sum-check optimizations are out! We propose a *better* domain for sum-check: the infinity hypercube. Evaluations over this domain give *precisely* the monomial coefficients, and lead to a ~10% prover speedup over 128+ bits prime fields 🧵/ n
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We have an update on the proximity prize: a 1m$ initiative to prove or disprove coding theoretic conjectures, with applications to shorter quantum-secure proof systems. We have released the first draft: cc @GalArnon42 and @danboneh
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Excited to share that our DahLIAS paper has been accepted to Eurocrypt 2026! 🎉 DahLIAS enables cross-input signature aggregation (CISA) on Bitcoin’s secp256k1 curve. See you in Rome, May 10–14! Thanks to @yannickseurin (@ledger), @real_or_random & @n1ckler (@blksresearch)!
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Aptos mainnet will enable 🔒 confidential assets 💸 very soon!! i.e., encrypted balances & transaction amounts 🔐, albeit with publicly-visible 🌍 sender & recipient addresses! (One step at a time, folks...) Here's how they work! 🤓👇
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1./ Now when announcement is finally out, maybe I'll make a short explainer. 🧵
We just published "Hash-based signatures for Bitcoin," a new analysis of post-quantum schemes by @kudinov_mikhail and myself at @blksresearch. This paper serves as a gentle intro to hash-based schemes and explores how to optimize them specifically for application in Bitcoin. 🧵
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