A defense against quantum computing attacks native to Tockchain that relies on physical constraints rather than algorithmic hardness alone. The mechanism centers on the Coldspend Transaction, which leverages speed-of-light propagation and the first-seen rule to sweep funds to a fresh Hashed Address before a quantum attacker can derive the private key from a momentarily exposed public key. Combined with Quantum Resistant Cold Storage, quantum protection is one of two approaches to achieving Quantum Security, the other being Quantum Resistance.
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