TLDR
- Project Eleven CEO Alex Pruden urged Bitcoin developers to accelerate work on post-quantum signature schemes.
- He said acting early would add an optional security tool while waiting could expose a $2.3 trillion asset class.
- Pruden warned that a powerful quantum computer could derive private keys from exposed public keys on the Bitcoin blockchain.
- Project Eleven estimates that about 6.9 million Bitcoin sit in addresses with exposed public keys.
- He stated that the migration to quantum-resistant cryptography will be more complex than the Taproot upgrade.
Project Eleven CEO Alex Pruden urged Bitcoin developers to move from research to production on quantum-resistant signatures. He spoke at CoinDesk’s Consensus Miami and framed the issue as a risk decision. He said acting early adds an optional tool, while waiting risks exposure of a $2.3 trillion asset class.
Bitcoin Quantum Upgrade Requires Immediate Production Focus
Pruden said developers must shift from theory to deployment and accelerate implementation. He stated, “Let’s focus on the D of R&D,” and pressed for production code. He warned that waiting increases exposure to quantum attacks on elliptic-curve cryptography. He said Shor’s algorithm could derive private keys from exposed public keys.
Project Eleven estimates about 6.9 million Bitcoin sit in addresses with exposed public keys. That amount equals nearly one-third of the total supply. Pruden said an advanced quantum machine could front-run transactions within one block. He explained attackers could derive keys and submit higher-fee transactions before confirmation.
He cited NIST standards for post-quantum schemes based on hash functions and lattices. He said community discussion trends toward hash-based options. He referenced BIP-360, which proposes a quantum-resistant Taproot output type. He also noted Blockstream deployed a hash-based signature scheme on its Liquid Network.
Pruden said the migration challenge exceeds Taproot’s scope and timeline. Taproot took about five years from proposal to activation. He said most users never migrated because adoption remained optional. He stressed that a post-quantum shift requires participation from holders, wallets, exchanges, and institutions.
Satoshi Coins and Bitcoin Core Responses Shape Debate
Pruden addressed dormant coins held in vulnerable addresses, including about 1.1 million linked to Satoshi Nakamoto. He acknowledged tension between fixed supply and property rights. When pressed, he said dormant coins could return to the supply curve to extend mining incentives. He added, “If you put me on the hot seat, that’s probably what I would say.”
He clarified that the community and institutions will decide any policy outcome. He said Bitcoin Core does not act as a single body on quantum urgency. He stated some contributors treat the threat seriously, while others remain skeptical. He said views differ on when quantum machines become practical.
Pruden cited a March 2026 paper from Google Quantum AI on elliptic-curve cryptography. He said researchers estimated breaking 256-bit keys may require 20 times fewer qubits than earlier projections. He said Google set a 2029 internal deadline for its post-quantum migration. He referenced Project Eleven’s Q-Day Prize and a 15-bit elliptic-curve break on public hardware.
He said the demonstration marked a 512x jump from the prior public record. He noted the result does not threaten 256-bit security yet. He said the pace of practical quantum experiments continues to advance. Bitcoin traded near $80,966 as the broader crypto market rallied on geopolitical tailwinds.
