Bitcoin’s quantum upgrade path: What BIP-360 changes and what it does not

How BIP-360 reshapes Bitcoin’s quantum defense strategy, what it improves and why it stops short of full post-quantum security.

BIP-360 formally puts quantum resistance on Bitcoin’s road map for the first time. It represents a measured, incremental step rather than a dramatic cryptographic overhaul.

Quantum risk primarily targets exposed public keys, not Bitcoin’s SHA-256 hashing, making public key exposure the central vulnerability developers aim to reduce.

BIP-360 introduces Pay-to-Merkle-Root (P2MR), which removes Taproot’s key path spending option and forces all spends through script paths to minimize elliptic curve exposure.

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