Which outcome undermines secure quantum key distribution when atmospheric turbulence affects entangled photons?

💡 Explanation

Increased eavesdropping likelihood appears because atmospheric turbulence induces depolarization, affecting photon pair correlations, which affects the photons spin. This enables measurements of the qubits, rather than high security Key agreement based on entanglement, maintaining security if unobserved. QKD is undermined.

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