Experimental quantum key distribution now detects eavesdropping on 15% of shared qubits without discarding any key material. This contrasts with conventional methods, which necessitate revealing and losing key bits to verify security. Embedding cryptographic operations within a photonic quantum switch allows for covert eavesdropper detection via a control qubit, representing a new direction for secure communication.
Researchers Detect Eavesdropping with 15% Qubit Probability
Experimental quantum key distribution now detects eavesdropping on 15% of shared qubits without discarding any key material. This contrasts with conventional methods, which necessitate revealing and losing key bits to verify security. Embedding cryptographic operations within a photonic quantum switch allows for covert eavesdropper detection via a control qubit, representing a new direction for secure communication.