Solana's two principal validator client teams have independently selected the same post-quantum digital signature scheme, Falcon, and begun building early implementations as the blockchain industry accelerates preparations against the theoretical threat posed by quantum computing.
The Solana Foundation said on Monday that Anza and Jump Crypto's Firedancer team conducted separate technical evaluations before reaching the same conclusion: Falcon, one of the signature schemes approved by the US National Institute of Standards and Technology (NIST), is the most viable option for protecting a high-throughput blockchain without sacrificing performance.
Both teams have published initial Falcon implementations to their public GitHub repositories, with Anza's work dating back to at least January.
"Quantum is still years away, and if and when it materialises, the work to migrate Solana is well-researched, understood, and ready to deploy," the foundation said.
The independent convergence is significant because Anza and Firedancer collectively represent the vast majority of Solana's validator infrastructure, meaning their alignment removes a potential coordination bottleneck if an urgent upgrade becomes necessary.
Jump Crypto noted that Falcon-512 produces the smallest signature among the NIST-approved post-quantum standards, a critical constraint for Solana's architecture, which processes tens of thousands of transactions per second and cannot absorb the larger signature sizes that some alternative quantum-resistant schemes require.
The foundation outlined a phased roadmap: continued research and testing of Falcon alongside alternative schemes, followed by the introduction of post-quantum signatures for new wallets if the threat becomes credible, and eventual migration of existing wallets.
No immediate protocol change is planned, and users do not need to take any action.
The urgency behind the preparations has been sharpened by a March whitepaper from Google Quantum AI and the California Institute of Technology, which argued that future quantum machines could crack the elliptic curve cryptography used by bitcoin and other blockchains, with roughly 6.9 million BTC, about a third of total supply, potentially at risk.
A previous Solana update designed to bolster quantum resistance, rolled out in early April, reportedly caused network slowdowns, highlighting the engineering tension between stronger cryptography and the speed that distinguishes Solana from competitors.
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Solana is not the only network moving.
Tron founder Justin Sun said last week that the network will activate a quantum-resistant testnet in the second quarter and target a mainnet rollout in the third, while Ethereum co-founder Vitalik Buterin has urged faster post-quantum upgrades, warning that current cryptography could be vulnerable sooner than widely assumed.
The recap
- Anza and Firedancer are Solana core developer teams.
- They chose Falcon, a new digital signature scheme.
- Change intended to protect network from quantum threats.
