Solana post-quantum cryptography tests slash network speed by 90% as signatures balloon to 40x current size

Solana has been testing post-quantum cryptography on a testnet as part of a broader effort to assess how vulnerable its current signature system could be to future quantum computers. The work was done with Project Eleven and focused on threat assessment for wallets, validator identities, and the network’s cryptographic assumptions, with Solana saying the migration path is being actively studied rather than needed immediately. The key tradeoff is performance: the Coindesk story says Solana’s post-quantum tests cut network speed by about 90% because the replacement signatures were roughly 40 times larger than current ones. That matters because Solana is a high-throughput chain whose design depends on compact signatures and low verification overhead, so any quantum-safe upgrade would have to balance future security against today’s scalability and bandwidth constraints.

✨ AI-generated background, compiled from web sources — not editorial content.

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