The quantum computing threat to crypto gained fresh attention after the US Commerce Department finalised support for quantum hardware companies on 8 September 2026. Bitcoin and Ethereum developers are working on protection against future attacks, although the announcement does not establish that such attacks are imminent.
CoinDesk reported awards of up to US$100 million each for Rigetti, D-Wave and Quantinuum. It also reported that Ethereum’s protocol team is targeting December 2029 for quantum resistance across its base layer, while Bitcoin has no equivalent network-wide deadline.
The immediate challenge is preparation. Changing cryptography across networks, wallets and financial services requires time, testing and agreement.
Figure 1: Physical representations of Bitcoin and Ethereum, whose developers are examining protections against future quantum attacks. Image credit: Coinspeaker.
What Has the US Announced?
The funding supports quantum hardware development rather than a cryptocurrency-specific security programme.
In its announcement from Washington, the Commerce Department confirmed a final award of up to US$100 million for D-Wave under the CHIPS and Science Act. The research covers semiconductor technologies for superconducting quantum systems.
Its stated priorities include increasing qubit counts, reducing errors and improving coherence; the ability to preserve quantum information. Materials, interfaces and advanced packaging are also part of the work. These details appear in the official NIST funding announcement.
“Up to” matters here. The figure describes the maximum award, rather than proof that the entire amount has already been spent.
Key Details Behind the Security Debate
The funding and software timelines describe different developments. They should not be read as a countdown to a confirmed attack.
| Development | Reported position | What it means |
| US hardware support | Up to US$300 million across three companies | Funding for quantum development |
| Ethereum preparation | December 2029 base-layer target | A planning objective, not a completed upgrade |
| Bitcoin preparation | Proposals under discussion | No network-wide migration deadline |
| Threat timing | No demonstrated attack deadline | Hardware capability remains uncertain |
Funding totals and network timelines: CoinDesk’s report
A research target can change. So can the time required to agree on, test and deploy a blockchain upgrade.
Why Could Quantum Computing Affect Wallets?
Cryptocurrency transactions use digital signatures to demonstrate that a payment was authorised by the holder of a private key.
The concern is that a sufficiently capable quantum computer could recover certain private keys from their corresponding public keys. That would undermine the mathematical protection behind affected signatures.
Bitcoin’s draft BIP-360 describes this risk and proposes reducing exposure through a new transaction output design. Its protection is limited: it addresses attacks where public keys remain exposed for extended periods. Protecting keys revealed briefly during a transaction would require further measures.
That makes the quantum computing threat to crypto a question of both mathematics and implementation. Developers must consider which keys are exposed, how transactions work and how users would move to stronger protection.
Figure 2: IBM Quantum System Two, shown as an example of quantum computing infrastructure. IBM is separate from the three funding recipients discussed in this report. Image credit: IBM.
Bitcoin and Ethereum Face Different Upgrade Tasks
Bitcoin’s BIP-360 remains a draft, rather than an activated network feature. Its proposed Pay-to-Merkle-Root design removes Taproot’s key-path spending option to address one form of exposure.
Ethereum has a broader collection of cryptographic components to consider. Its published security roadmap identifies account signatures, validator signatures, data commitments and zero-knowledge proof systems as areas requiring post-quantum preparation.
A change to the base protocol would not automatically update every wallet or application. Services would need compatible software, testing and clear instructions for customers.
That coordination is a substantial part of the job. A technically sound design still needs a workable route into everyday use.
Why It Matters for Australian Crypto Businesses
Australian exchanges and custodians rely on these global networks. Any future migration could affect deposit systems, withdrawal processes, signing equipment and customer support.
The practical question for an operator is how to introduce new protection without interrupting access to funds. Institutions would also need to check whether their custody arrangements support any adopted changes.
For investors, a quantum funding announcement alone provides no reliable signal about the next Bitcoin or Ethereum price move.
Crafmin’s coverage of crypto markets’ investor caution explores the separate influence of economic conditions on trading sentiment. Security planning operates on a different timescale.
Figure 3: An IBM Quantum Heron processor. Image credit: IBM, via Oklahoma State University.
What Happens Next?
The quantum computing threat to crypto will be easier to assess through measurable progress than headline deadlines.
Relevant developments include:
- Hardware performance: Demonstrated improvements in error correction and reliable computation.
- Protocol review: Independent assessment of proposed security changes.
- Testing: Evidence that new designs work under realistic conditions.
- Adoption decisions: Confirmation of which proposals networks will implement.
- Migration support: Compatible wallets and clear procedures for moving affected assets.
CoinDesk’s report on the quantum hardware push makes the timing distinction clear: 2029 is a preparation window, not an established date when Bitcoin or Ethereum becomes breakable.
The next meaningful milestone is a tested migration path that services and users can follow.
Also Read: Bitcoin Defenders Push for Frontier AI Access as Crypto Security Race Intensifies
FAQ
Q1. Is the US funding a programme to attack cryptocurrency?
The announcement concerns quantum hardware research and development.
Q2. Is US$300 million already spent?
The reported figure is the combined maximum value of the awards.
Q3. Will quantum computers break crypto in 2029?
No confirmed attack date has been established.
Q4. Has Bitcoin adopted BIP-360?
The document reviewed remains a draft proposal.
Q5. Would a protocol upgrade finish the transition?
Wallets, applications and custodians would also need compatible systems.
Disclaimer
This article has been prepared for Crafmin for informational purposes only and does not constitute investment advice. Information is based on published reporting, government announcements and technical documentation. Readers should independently verify developments before making decisions. Quantum hardware timelines and proposed network upgrades remain subject to research, testing and implementation uncertainties.
