| 摘要 |
Quantum cryptography by polarization ambiguity is generally used but it involves polarization-maintained fibers. This invention proposes an alternative: quantum cryptography by ambiguity in time. It comprises the conversion of K bits to be transmitted into a train of K pulses of particle flows of time width DeltaT and whose frequency Tb, is predetermined knowing that each of the K pulses being shifted or not in time such that the k<SUP>th </SUP>pulse is shifted by a duration t 0 respectively t 1 , with respect to the initial instant of the period depending on the value "0", respectively "1" of the k<SUP>th </SUP>bit, where k is an integer such that 0<=k<K and the shifts t 0 and t 1 are such that 0<=t 0 ,t 1 <=Tb-DeltaT and 0<|t 1 -t 0 |<DeltaT. |
