  Information reconciliation(IR) is a basic step of quantum key distribution
(QKD). Classical message interaction is necessary in a practical IR scheme, and
the communication complexity has become a bottleneck of QKD's development. Here
we propose a concatenated method of IR scheme which requires only one time
one-way communication to achieve any given error rate level. A QKD scheme with
the concatenated IR can work without the special interaction of error rate
estimation.
