Information reconciliation schemes in physical-layer security: A survey

Information reconciliation is an essential part of physical-layer based key agreement. It enables the equalization of similar, but disagreeing channel observations of respective communicating parties. Due to a broad variety of underlying mathematical constructions and a large parameter space, there is a lack of systematic classification of the individual schemes. To address this issue, we present an extensive survey of existing protocols. Furthermore, we derive a generalized layer model for information reconciliation, show how existing approaches map to this model and how it supports future research work in this field.