There’s a Way to Make Bitcoin Safe From Quantum Without a Fork, Researchers Say
A new proposal suggests Bitcoin users could defend against future quantum attacks using a transaction design that works within the network’s existing rules.
Researchers have put forward a proposal suggesting that Bitcoin could be made resistant to quantum computing attacks through a clever transaction design — without requiring any changes to the network's underlying consensus rules or triggering a contentious hard fork. The approach works within Bitcoin's existing scripting framework, allowing individual users to voluntarily opt into stronger cryptographic protections without disrupting the broader network.
Bitcoin currently relies on the Elliptic Curve Digital Signature Algorithm (ECDSA), which is considered secure against classical computers but theoretically vulnerable to sufficiently advanced quantum machines capable of deriving private keys from public keys. The new proposal suggests incorporating post-quantum cryptographic elements — such as hash-based signature schemes — directly into transaction structures. This means users could shield their funds from future quantum threats at the application layer, bypassing the need for a protocol-wide soft fork or hard fork that would require broad consensus across miners, developers, and node operators.
The implications for Bitcoin's long-term security narrative are significant. Quantum resilience has historically been one of the most politically sensitive topics in the Bitcoin development community, as any mandatory protocol change risks fracturing consensus. A non-invasive, opt-in solution could prove far more palatable and see faster real-world adoption. If validated by the broader developer community, this proposal may ease investor concerns about the long-term viability of BTC as a store of value in a post-quantum world, and could inspire similar approaches across other blockchain networks.
Source: Decrypt (https://decrypt.co/364092/quantum-safe-bitcoin-transactions-without-fork)