Bitcoin’s quantum dilemma: Bigger blocks vs STARK proofs

Published: 2026-07-09 13:34:14 |

Bitcoin’s quantum dilemma centres on how to keep BTC secure against post-quantum (PQ) threats without harming network throughput. StarkWare co-founder Eli Ben-Sasson argues that ZK STARK proofs and signature aggregation can compress much larger PQ signatures (often 10–100× bigger than current ECDSA/Schnorr) into a small proof, potentially preserving or improving speed—unlike simply increasing block size, which requires every node to store and verify more data. Ben-Sasson says “massive scale” needs aggregation, not just larger blocks, and he also drew controversy for proposing 4% annual Bitcoin inflation. Separately, researcher Marin Ivezic notes SegWit helps reduce signature overhead, and models for NIST’s ML-DSA-44 could drop capacity to ~500–700 transactions per block from ~2,500–3,000. Blockstream is exploring hash-based PQ signature compression (SHRINCS/SHRIMPS), but this can still slow the chain unless block capacity grows. The alternative path is adding Bitcoin script capabilities (potentially re-enabling OP_CAT) or using STARK-related opcodes (e.g., OP_STARK_VERIFY) and signature schemes such as BitZip. However, Byte/consensus-layer verification for STARKs is viewed as politically hard and realistically a 2030s discussion. Ethereum targets post-quantum readiness by 2029, while Starknet’s plan benefits from native account abstraction, making upgrades easier than on base-layer Bitcoin. Overall, the key debate is whether Bitcoin can adopt STARK proofs fast enough without compromising decentralization.

Neutral

This is a protocol-design debate, not an immediate network or policy change. Traders may treat it as “option value” for the medium/long term: if STARK proofs and signature aggregation become feasible, BTC could handle post-quantum signatures with less impact on throughput—supportive for long-run sentiment. However, the article stresses that base-layer STARK verification requires new Bitcoin Script/consensus changes (e.g., OP_CAT/OP_STARK_VERIFY) and faces major governance hurdles, likely pushing real deployment to much later. That uncertainty usually limits short-term price impact. The only potentially price-relevant angle is Ben-Sasson’s controversial 4% annual inflation suggestion, but the article also notes weak support from replies, reducing likelihood of near-term action. Historically, when crypto news focuses on cryptography roadmaps (e.g., ZK scaling, post-quantum migration plans), markets often react mildly unless a concrete, implementable upgrade timeline emerges. Hence, the expected market effect is mostly neutral, with volatility dependent on future Bitcoin Core/BIP progress and any credible activation path for STARK-related changes.