Charles Hoskinson Questions Bitcoin SPHINCS+ Post-Quantum Security Plan
Charles Hoskinson criticized Bitcoin’s post-quantum security plan, specifically the use of SPHINCS+ hash-based signatures.
He argued SPHINCS+ is the “least expressive” option: it may improve resistance to future quantum threats, but it offers limited flexibility for broader protocol upgrades.
Key trade-offs for SPHINCS+ post-quantum security were highlighted. SPHINCS+ signatures are much larger than today’s ECDSA/Schnorr signatures, which could increase transaction sizes and pressure Bitcoin’s scalability.
Just as important, Bitcoin’s slow upgrade cycle may “lock in” current cryptographic choices for years. The latest framing also notes that developers lean toward simplicity and reduced attack surface, even though large-scale quantum computers capable of breaking Bitcoin do not exist today.
For traders, the takeaway is not an immediate cryptographic break. Instead, it adds uncertainty to Bitcoin’s post-quantum roadmap, which can affect long-duration BTC sentiment as markets price in security vs. future functionality trade-offs.
Neutral
This news is more about cryptographic design philosophy and upgrade trade-offs than an imminent break of Bitcoin’s current security. In the short term, the bigger SPHINCS+ signature size and “locked-in” upgrade choices can add narrative uncertainty, but there is no direct catalyst for BTC to reprice on the same day.
In the long term, the debate could affect sentiment around Bitcoin’s post-quantum readiness and future protocol flexibility. Traders may watch for follow-up developer discussions or roadmap changes, but until SPHINCS+ (or alternatives) is actually adopted and performance impacts are quantified, the expected price impact on BTC itself is likely limited.