Key points are not available for this paper at this time.
The secure transmission of cryptographic keys is demonstrated over a 10 km-long optical fibre channel using a technique called ‘quantum cryptography’. Single-photon detector noise and nonideal modulator frequency response lead to error rates of ~6% in the transmitted keys that are corrected using publicly agreed key permutations and parity checks.
P. D. Townsend (Thu,) studied this question.