Open AccessBuild‐in wiretap channel I with feedback and LDPC codes by soft decision decoding
Author(s) -
Zhang Gaoyuan,
Wen Hong,
Pu Jiexin,
Tang Jie
Publication year - 2017
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2016.0880
Subject(s) - low density parity check code , decoding methods , computer science , additive white gaussian noise , channel (broadcasting) , randomness , theoretical computer science , algorithm , binary number , binary symmetric channel , computer security , telecommunications , computer network , mathematics , arithmetic , statistics
Many approaches to build a wiretap channel (WTC) by multi‐input multi‐output system have been introduced. Different from those approaches, the authors propose a feedback method combined with the low‐density parity‐check (LDPC) codes for building the WTC I (WTC‐I) to achieve unconditional security under single‐input single‐output system by the soft decision decoding. The novel approach establishes the WTC‐I on both the binary symmetric channel and binary input additive white Gaussian noise channel. In order to keep the eavesdropper be fully ignorant about the secret information, randomness is added to the feedback signals from the destination by taking advantage of feedback. In addition, the message to be sent is encoded by the LDPC codes such that it can be correctly decoded by a legitimate receiver. Furthermore, the secret information transmission capacity can be improved by the soft decision decoding.