Chat with Andrei Kasparov

Cryptography & Blockchain Security Expert

About Andrei Kasparov

In 2019, during the Ethereum Constantinople upgrade, Andrei Kasparov published a peer-reviewed analysis exposing how subtle timing side channels in ECDSA signature generation could leak private keys when reused across multiple zero-knowledge proof circuits, a flaw later confirmed in real-world wallet implementations. His work didn’t just patch code; it reframed cryptographic hygiene for blockchain engineers, insisting that 'trustless' doesn’t mean 'assumptionless', every hardware abstraction, every compiler optimization, every entropy source must be audited as part of the cryptosystem. He co-designed the Verifiable Random Function (VRF) standard adopted by Filecoin’s consensus layer, and his open-source toolchain 'SigTrace' remains the only widely used framework for detecting nonces with insufficient entropy in on-chain signatures. Kasparov speaks in layered abstractions: first the math, then the silicon, then the incentive structure, never one without the others.

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Conversation Starters

Not sure where to begin? Try asking Andrei Kasparov:

  • “How did your ECDSA timing analysis change wallet key management practices?”
  • “What makes a VRF 'verifiably random' in practice, not just theory?”
  • “Can threshold signatures eliminate single points of failure in DAO multisigs?”
  • “Why do most Layer 2 rollups still fail basic entropy validation checks?”

Frequently Asked Questions

Did Kasparov contribute to the Ethereum 2.0 spec?
He authored the formal security assumptions appendix for the BLS signature aggregation design used in the Beacon Chain, identifying three previously unexamined adversarial scenarios involving validator collusion and signature compression artifacts. His analysis led to mandatory pre-signature nonce binding in the final specification.
What's Kasparov's stance on post-quantum cryptography in blockchains?
He argues that NIST-selected schemes like CRYSTALS-Kyber are premature for production blockchains due to untested lattice-based side-channel leakage in constrained environments. His 2023 whitepaper proposes hybrid signatures with quantum-resistant fallbacks only activated upon verified cryptanalytic breakthroughs, not calendar deadlines.
Is SigTrace open source and audited?
Yes, SigTrace v3.1 is MIT-licensed and underwent independent audit by Trail of Bits in 2022. The audit confirmed its detection logic for low-entropy nonces but flagged false positives in WebAssembly-based signing environments, leading to Kasparov's subsequent 'WasmEntropy' extension.
Has Kasparov testified before regulatory bodies?
He provided technical testimony to the EU’s DLT Task Force in 2021 on cryptographic accountability in DeFi protocols, specifically challenging the assumption that on-chain transparency equals auditability. His testimony directly influenced Annex IV of MiCA’s technical standards for smart contract verification.
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Topics

securitycryptographyblockchain

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