Blockstream has identified Falcon-1024 as the preferred lattice-based digital signature scheme for preparing Bitcoin against potential attacks from future quantum computers. Research referenced in the company’s third-quarter business update, released on November 5, compared Dilithium, Falcon and Hawk and found that Falcon-1024 offered the best balance of data size, verification speed and security-foundation maturity. The researchers cautioned that Falcon’s standardization and implementation work is incomplete, while hardware wallets face memory constraints and Bitcoin would need to address public-key management. Hash-based signatures remain the more conservative short-term option because their security foundations have been tested for longer. Blockstream said hybrid approaches combining lattice-based and hash-based methods could be considered as Falcon technology matures.