BroadChain News, April 28 - According to Bitcoinist, Solana's two major validator clients, Anza and Firedancer, have respectively launched test versions of the post-quantum cryptographic signature scheme Falcon. Falcon-512 is currently the smallest signature among the algorithms approved by the National Institute of Standards and Technology. The two teams independently researched and agreed that quantum readiness is necessary, with Falcon being the suitable tool. Initial versions have been pushed to GitHub, with Anza's work dating back to January 27. The scheme is dormant by default and will only activate when quantum computers are powerful enough to crack public-key encryption, known as Q-Day.
Jump Crypto, the infrastructure company behind Firedancer, stated that Falcon was chosen because it avoids the issue of post-quantum algorithm signatures being too large, which could affect bandwidth and storage. Signatures are completed off-chain, and the verification implementation is not complex. Previously, Blueshift's Winternitz Vault has provided similar protection since January, but as an optional add-on rather than a network-wide protocol upgrade.
Reports indicate the urgency of the quantum threat is increasing. Google and the California Institute of Technology said last month that functional quantum computers may arrive sooner than expected, with the computing power required to crack encryption being lower than previously estimated. Google even claimed that a quantum machine could crack Bitcoin's cryptography in 10 minutes. Blockstream CEO Adam Back, however, believes current quantum computers are merely laboratory experiments and will not pose a real threat for decades. Quantum computing theory researcher Scott Aaronson largely agrees, stating that existing machines are far from the scale needed to threaten encryption.