Design and Implementation of Automated Steganography Image-Detection System for the KakaoTalk Instant Messenger

Abstract

As the popularity of social network service (SNS) messengers (such as Telegram, WeChat or KakaoTalk) grows rapidly, cyberattackers and cybercriminals start targeting them, and from various media, we can see numerous cyber incidents that have occurred in the SNS messenger platforms. Especially, according to existing studies, a novel type of botnet, which is the so-called steganography-based botnet (stego-botnet), can be constructed and implemented in SNS chat messengers. In the stego-botnet, by using various steganography techniques, every botnet communication and control (C&C) messages are secretly embedded into multimedia files (such as image or video files) frequently shared in the SNS messenger. As a result, the stego-botnet can hide its malicious messages between a bot master and bots much better than existing botnets by avoiding traditional botnet-detection methods without steganography-detection functions. Meanwhile, existing studies have focused on devising and improving steganography-detection algorithms but no studies conducted automated steganography image-detection system although there are a large amount of SNS chatrooms on the Internet and thus may exist many potential steganography images on those chatrooms which need to be inspected for security. Consequently, in this paper, we propose an automated system that detects steganography image files by collecting and inspecting all image files shared in an SNS chatroom based on open image steganography tools. In addition, we implement our proposed system based on two open steganography tools (Stegano and Cryptosteganography) in the KakaoTalk SNS messenger and show our experimental results that validate our proposed automated detection system work successfully according to our design purposes.

Deceptive Techniques to Hide a Compressed Video Stream for Information Security

“…The purpose of steganography is to secretly convey messages that others do not notice on the cover stream. This deceptive method prevents a security system from noticing whether the stream is an important message [16,17]. The initial compressed video steganography research began with a video watermarking method that manipulates the lower bits of the brightness value in the raw video domain, rather than in the compressed domain, to make it visually indistinguishable.…”

3D Virtual Animation Instant Network Communication System Design

“…The goal of this topic is to design a virtual video chat system combined with virtual reality, which needs to be based on application scenarios, transforming from the original transmission of video data to the transmission of user's face key point data and handling transmission abnormalities [2]. At the same time, because this topic is not based on video streaming instant messaging, but 3D virtual animation video chat, the user sees the expression animation of the virtual animation model during the chat, so the data format transmitted in the network is the dataset of face key points and voice data, and this topic is based on the actual applica-tion scenario; there are high requirements for the noise reduction and echo cancellation of voice; the synchronization of voice and animated expressions and speech optimization become the urgent problems in this project [3,4].…”