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User's mobility is increasing with the height level of mobility that the mobile networks offer. The information transmitted from A to B in a network has to be secured from any eavesdropping, so the main solution used is the cryptography. Nevertheless, the classical cryptography suffers from some limits that make it vulnerable in front of some kind of attacks like "attack by dictionary" or "exhaustive attack". In the other hand, the miniaturisation in processor industry (Moor's law) causes interferences. For that purpose and other new field appear to overcome that kind of problem. That is "Quantum cryptography". In the present paper we will present an enhanced proposition of integration the QKD in the 802.11i.