17
views
0
recommends
+1 Recommend
0 collections
0
shares
• Record: found
• Abstract: found
• Article: found
Is Open Access

# Achieving Secrecy Capacity of the Gaussian Wiretap Channel with Polar Lattices

Preprint

, ,

### Read this article at

Bookmark
There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

### Abstract

In this work, an explicit wiretap coding scheme based on polar lattices is proposed to achieve the secrecy capacity of the additive white Gaussian noise (AWGN) wiretap channel. Firstly, polar lattices are used to construct secrecy-good lattices for the mod-$$\Lambda_s$$ Gaussian wiretap channel. Then we propose an explicit shaping scheme to remove this mod-$$\Lambda_s$$ front end and extend polar lattices to the genuine Gaussian wiretap channel. The shaping technique is based on the lattice Gaussian distribution, which leads to a binary asymmetric channel at each level for the multilevel lattice codes. By employing the asymmetric polar coding technique, we construct an AWGN-good lattice and a secrecy-good lattice with optimal shaping simultaneously. As a result, the encoding complexity for the sender and the decoding complexity for the legitimate receiver are both O(N logN log(logN)). The proposed scheme is proven to be semantically secure.

### Author and article information

###### Journal
2015-03-08
2016-01-04
1503.02313

http://arxiv.org/licenses/nonexclusive-distrib/1.0/

###### Custom metadata
35 pages, 8 figures
cs.IT math.IT

Numerical methods, Information systems & theory