Bitcoin's Post-Quantum Security Strategy Under Scrutiny

Charles Hoskinson, the founder of Cardano and Midnight projects, has criticized Bitcoin's post-quantum security strategy. He claims that Bitcoin is opting for a less expressive and interesting post-quantum signature scheme over something more adaptable and future-proof.

The disagreement centers around the use of SPHINCS+, a hash-based stateless signature system considered to be safe from quantum attacks. However, it has limitations in terms of flexibility and expressiveness compared to other post-quantum cryptographic systems.

Hoskinson argues that this choice represents a missed opportunity for more significant upgrades. On the other hand, Bitcoin developers prioritize reducing the attack surface and adhering to proven design principles, which aligns with the simplicity of SPHINCS+ relying on hash functions rather than complex mathematical constructions.