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Melbourne Village Today
By the People, for the People
Bitcoin Quantum-Safe Without Protocol Changes? QSB Explained!
A new research proposal offers a way to fortify Bitcoin against quantum attacks without altering the core protocol.
Apr. 11, 2026 at 6:35am
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Quantum-safe technology illuminates the Bitcoin network, safeguarding transactions against the looming threat of quantum attacks.Melbourne Village TodayIn the ever-evolving landscape of cryptocurrency, the race to fortify against emerging threats is a constant. One of the most pressing concerns is the potential vulnerability of Bitcoin to quantum computers, which could render its current cryptographic foundations obsolete. However, a recent research proposal called Quantum Safe Bitcoin (QSB) offers a solution that could make Bitcoin quantum-safe without requiring changes to the core protocol.
Why it matters
This development not only highlights the adaptability of the Bitcoin network but also underscores the importance of proactive security measures in the digital currency realm. By avoiding protocol changes, QSB presents a path that may shape further debate on long-term network security as the cryptocurrency landscape continues to evolve.
The details
The crux of QSB lies in a 'hash-to-signature' puzzle that hashes a transaction-derived public key and treats the output as a candidate ECDSA signature. This creates a proof-of-work condition, making it computationally expensive for a quantum attacker to generate a valid transaction. The approach leverages the properties of hash functions rather than the hardness of elliptic curves, providing meaningful security margins even against Shor's algorithm.
- The QSB proposal was introduced by Avihu Levy of StarkWare in 2026.
The players
Avihu Levy
A researcher at StarkWare who introduced the Quantum Safe Bitcoin (QSB) proposal.
Bitcoin
A decentralized digital currency that could be made quantum-safe through the QSB approach.
What’s next
The QSB proposal adds to ongoing research exploring how Bitcoin could adapt to a future with quantum computing. Its compatibility with existing protocol rules may shape further debate on long-term network security.
The takeaway
The proposal of a quantum-safe Bitcoin without protocol changes is a significant development in the cryptocurrency space, highlighting the adaptability of the Bitcoin network and the importance of proactive security measures in the digital currency realm.
