Quantum key distribution without alternative measurements and rotations
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A quantum key distribution protocol based on entanglement swapping is proposed. Through choosing particles by twos from the sequence and performing Bell measurements, two communicators can detect eavesdropping and obtain the secure key. Because the two particles measured together are selected out randomly, we need neither alternative measurements nor rotations of the Bell states to obtain security.
11 pages, no figures, a modified version of quant-ph/0412014, add a security proof and delete the identification part
11 pages, no figures, a modified version of quant-ph/0412014, add a security proof and delete the identification part