Quantum Computing and Bitcoin: What the 2031 Federal Deadline Means for Developers

Short summary

The U.S. federal government mandates post-quantum cryptographic migration by 2031, but Bitcoin's ECDSA signatures remain vulnerable to future quantum attacks. Post-quantum alternatives like ML-DSA are 38x larger, reducing Bitcoin throughput by 90%, and BIP-360 doesn't address capacity limits or migration of existing coins. The threat is immediate: attackers can harvest encrypted data now and decrypt it when quantum computers arrive.

• •U.S. government deadline in 2031 for post-quantum crypto migration; Bitcoin unaffected but vulnerable—a critical gap
• •Post-quantum signature schemes are 38x larger than ECDSA, reducing Bitcoin throughput from ~2,500 to ~230 transactions per block
• •Existing Bitcoin addresses with exposed public keys cannot be migrated without breaking them, creating permanent vulnerability window

Generated with AI, which can make mistakes.