On Steganography in Lost Audio Packets

TL;DR

This paper introduces a novel steganographic method called LACK for embedding hidden data in VoIP calls by estimating call duration, analyzing its impact on call quality and resistance to detection, and comparing it to previous methods.

Contribution

It proposes a new data insertion procedure for LACK based on estimated remaining call time, improving stealth and robustness over prior approaches.

Findings

LACK's data insertion minimally affects voice quality.

The method demonstrates increased resistance to steganalysis.

Analytical results validate the effectiveness of the new procedure.

Abstract

The paper presents a new hidden data insertion procedure based on estimated probability of the remaining time of the call for steganographic method called LACK (Lost Audio PaCKets steganography). LACK provides hidden communication for real-time services like Voice over IP. The analytical results presented in this paper concern the influence of LACK's hidden data insertion procedures on the method's impact on quality of voice transmission and its resistance to steganalysis. The proposed hidden data insertion procedure is also compared to previous steganogram insertion approach based on estimated remaining average call duration.