CryptoSlate
Ethereum's new post-quantum signatures are 40x larger, putting network throughput and user costs under pressure. Its roadmap gives banks a 2027 deadline, while Coinbase, Solana, Polkadot and Bitcoin have also moved on post-quantum planning.
Why it matters
Post-quantum protection creates a capacity problem alongside the security upgrade. Larger signatures increase the network burden, so Ethereum must balance resilience with throughput and affordable transactions.
For banks, the 2027 date makes the issue an infrastructure priority. Wallet UX and signature aggregation may determine how smoothly institutions and users handle the migration, and which ecosystem manages the cost best.
Market impact
The immediate market risk is a fee and throughput squeeze if Ethereum cannot contain the 40x signature expansion. That makes the roadmap an infrastructure risk even though it addresses long-term security.
The comparison now spans Ethereum, Solana, Polkadot and Bitcoin, with Coinbase also moving on post-quantum planning. The key watchpoint is whether aggregation and wallet design can keep user costs manageable as banks approach 2027.
Frequently asked questions
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How large are Ethereum's new post-quantum signatures?
They are 40x larger, putting pressure on Ethereum's network throughput and user costs.
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What makes the 2027 deadline significant for banks?
It turns post-quantum preparation into an infrastructure priority tied to wallet design, network capacity and user costs.
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Why do wallet UX and signature aggregation matter here?
They may determine how effectively Ethereum and competing ecosystems manage the cost and capacity burden of signatures that are 40x larger.
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Which crypto networks and institutions are in the planning race?
Ethereum, Solana, Polkadot and Bitcoin are named, while Coinbase is also moving on post-quantum planning.
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What is the main market risk from Ethereum's roadmap?
The main risk is tighter throughput and higher user costs if Ethereum cannot contain the burden of 40x-larger signatures.
CoinTelegraph
Benjamin Cowen
CoinDesk
Glassnode
WuBlockchain