In the era of computerization, technology has deeply penetrated every aspect of human life. There is rapid diffusion of the internet with every sector of society be it economy, governance,
administration, education, corporate, defense, etc. This induces the critical need for secure transfer, protection, and authorized access of data. Data is an asset and privacy is the need. Steganography can be defined as the art or technique to securely hide the data and prevent it from unauthorized access.
Steganography is used to embed the secret data in a cover file (text file, audio, images, video file) and transfer it through the communication channel and later the secret data can be retrieved from the cover file at the receiver’s end. The secret data, cover file, and optional secret key are passed in the embedding algorithm and then stegocover is produced through which data is transmitted. On the receiver’s end, the secret data is retrieved using the decoder algorithm and the secret key.
The technique used in steganography should comply with some basic features to evade and protect data from prying eyes. Steganography should achieve robustness and hiding capacity without degrading the cover file. And technique used in steganography should be tamper-resistant to protect the secret data.
Many algorithms and tools have been developed which can be used to apply steganography techniques. In the further part of the blog, we will discuss some popular tools of steganography.
The steganographic method can be used to embed secret data in the Image cover file. We will discuss the three most used tools to hide a message in an image.
It is one of the most famous tools used to hide a message in an image file efficiently and effectively. But this tool can be used only in a .jpeg image file.
Installing steghide in Kali Linux
Embedding a text file into image cover file
Extracting hidden message from the cover file
It is the tool used to embed and extract data in .png and BMP-based image files.
Installing zsteg using ruby command
Detect embedded data in a PNG image
Detect embedded data in a BMP image, using all known methods
It is one of the best tools used to extract data from all types of files. It helps in extracting any data even though if we are unknown about what to find.
AUDIO BASED STEGANOGRAPHY
Secret data can be embedded in an audio file.mp3 and wav. And later the secret message can be extracted. Some tools are AudioStego, mp3stego, spectrology, etc.
This tool is used to extract and embed data in an audio file ( .mp3 and wav ).
How to hide
How to recover
Video steganography is becoming popular and an important technique. Video has become the most favored one to hide secret data. OpenPuff is a tool that can be used for video steganography.
Steganography is a staggering topic. It is the technique that plays a key role in data hiding and privacy in the world of vulnerabilities, threats, and risks. It is a topic of broad discussion. It has both advantages and disadvantages. Because the amount of data it hides is fairly low and little used, its significance can’t be ignored. Many crucial tools used in steganography are the keen topic of study.
For hands-on practice on Steganography, some dedicated rooms to this topic can be used.
Hope I was able to keep my point in this blog.