Multi Wings Chaotic Encryption Scheme for PAM-DMT-Based Optical Access Network

Abstract

In this paper, we propose a novel 3-dimension multi wings chaotic encryption scheme for PAM-DMT-based optical wireless access network. In our proposed scheme, one dimension (x) is used for XOR operation, one dimension (y) is used for confusion of PAM signal's amplitude and one dimension (z) is use for DMT subcarrier scrambling. We experimentally demonstrate the 3-dimension multi wings chaotic encryption scheme in PAM4-DMT optical access network. The experimental results show that our proposed scheme can effectively enhance physical-layer transmission security and simultaneously improve transmission performance. What is more, the proposed scheme has good scalability. It can be extended to high order PAM-DMT system and can use more wings to enlarge the key space. To verify the effectiveness of the scheme for practical application, encrypted transmission of a digital image in 60 km SMMF is demonstrated.

Keywords

• PAM-DMT
• Multi wings
• Chaotic encryption