Bitcoin and Ethereum developers are stepping up efforts to protect their networks against future quantum computing risks. The move comes as the U.S. government approved up to $300 million in funding for quantum hardware companies. Ethereum developers established a deadline of December 2029 to implement quantum-resistant protections across the network. Meanwhile, Bitcoin contributors are advancing proposals to transition users away from traditional signature schemes.
Blockchain developers working on Bitcoin and Ethereum are accelerating efforts to upgrade their security frameworks against future quantum computing capabilities. The push coincides with new government backing for advanced computing hardware, raising concerns that powerful quantum machines could eventually break the cryptographic algorithms protecting digital asset wallets.
The U.S. Department of Commerce finalized awards totaling up to $300 million under the CHIPS Act for three quantum technology firms: Rigetti, D-Wave, and Quantinuum. Each company will receive up to $100 million alongside federal equity investments to scale fault-tolerant systems, hardware manufacturing, and error-correction methods.
s government support accelerates hardware development, major blockchain communities are formalizing plans to make their underlying networks quantum-resistant.
Ethereum’s development team set a target date of December 2029 to transition its base layer to post-quantum standards. The planned upgrades are designed to protect the network’s consensus mechanism, execution layer, and data availability systems against potential attacks, anticipating that capable quantum systems could emerge around 2030.
Bitcoin developers are pursuing a similar timeframe without a single, network-wide deadline. Technical proposals under active discussion include:
- BIP-360: Introduces a new post-quantum transaction output format designed to support quantum-safe cryptography.
- BIP-361: Outlines a multi-phase plan to gradually phase out legacy signature types, including ECDSA and Schnorr signatures.
A major challenge facing Bitcoin’s migration involves coins stored in legacy addresses where public keys are already visible on the public ledger. These exposed addresses include an estimated 1 million coins associated with Bitcoin’s creator, Satoshi Nakamoto. Under proposed migration plans, accounts that fail to move funds to quantum-resistant addresses before a fixed cutoff date could risk losing the ability to spend those assets.
Traditional public-key cryptography relies on mathematical problems that are practically impossible for classical computers to solve within reasonable timeframes. However, fault-tolerant quantum computers running specialized algorithms could theoretically break these encryption standards.
Estimates from Google Quantum AI indicate that breaking 256-bit elliptic-curve cryptography could require fewer than 1,200 error-corrected qubits. Major computing companies like IBM and Quantinuum have set targets to deliver systems with hundreds of logical qubits near the end of the decade, prompting blockchain researchers to prioritize early upgrades.
While experts note that quantum systems capable of compromising existing wallet security are not yet operational, blockchain core teams are moving to implement updates well before such machines exist. Developers aim to establish finalized migration pathways by 2029 to ensure network security remains intact as quantum hardware advances.
