Problems in application of LDPC codes to information reconciliation in quantum key distribution protocols

摘要

The information reconciliation in a quantum key distribution protocol can bestudied separately from other steps in the protocol. The problem of informationreconciliation can be reduced to that of distributed source coding. Itssolution by LDPC codes is reviewed. We list some obstacles preventing theLDPC-based distributed source coding from becoming a more favorable alternativeto the Cascade protocol for information reconciliation in quantum keydistribution protocols. This exposition does not require knowledge of thequantum theory.