Flexible Blind Information Reconciliation for QKD based on Rateless Protograph LDPC codes

Information Reconciliation (IR) is a crucial step in the process of distillation of unconditionally secure keys in Quantum key distribution (QKD). Novel IR rateless codes based on protograph low-density parity-check (LDPC) codes have been recently designed to replace Cascade. In this paper, a blind IR protocol is described that exploits all the features of rateless protograph LDPC codes.