  In this paper, we propose how to construct a reconciliation method for the
BB84 Quantum Key Distribution (QKD) protocol. Theoretically, it is
unconditionally secure because it is based on the quantum laws of physics,
rather than the assumed computational complexity of mathematical problems. BB84
protocol performances can be reduced by various errors and information leakages
such as limited intrinsic efficiency of the protocol, imperfect devices and
eavesdropping. The proposed reconciliation method allowed to weed out these
errors by using Turbo codes. Since their high error correction capability
implies getting low errors, this method has high performance especially when
compared to the last method presented in the literature based on Low- Density
Parity Check codes (LDPC). In particular, we demonstrate that our method leads
to a significant improvement of the protocol security and of the Bit Error Rate
(BER) even with great eavesdropping capability.
