The Anza and Firedancer Solana validator clients have introduced Falcon, a post-quantum signature solution, in a testing environment.
Jump Crypto, the team behind Firedancer, said Falcon has the smallest signature among NIST standards, which could help preserve Solana’s high-throughput capabilities. Two of Solana’s most-used validator clients have implemented a test version of a new post-quantum signature solution, Falcon, to help prepare the Solana network for future quantum threats.
Falcon is built for “high-throughput blockchain use” and that it can be activated “if and when the time comes” — an apparent reference to Q-Day, the point at which quantum computers become powerful enough to break public-key encryption.
“The migration work is manageable, the transition can happen quickly when the time is right, and network performance is not expected to see a meaningful impact. ”Concerns that quantum computers could eventually break blockchain cryptography have fueled worries about private keys and wallet security, prompting broader debate over how the sector should prepare as the technology develops. One of those concerns has revolved around building quantum solutions that don’t impair blockchain performance by increasing bandwidth and storage.
Falcon-512 was built to generate the smallest signature currently among the US National Institute of Standards and Technology’s selected post-quantum signature standards. It added that Falcon signature verification is “not complex to implement” and that signing is executed offchain. Anza and Firedancer said they independently researched quantum solutions and both concluded that quantum readiness is necessary before agreeing to build Falcon.from Anza’s GitHub account shows that the development team has been working on Falcon since at least Jan. 27, 2026.
Blueshift’s Winternitz Vault has offered quantum security to Solana since January 2025, though it was designed as an optional add-on for users and thus isn’t a protocol-level upgrade.
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