What is steganography? Well, it is the way of hiding secret messages within an image. The text that is hidden is not able to be seen by the naked eye, which is due to altering the least significant bit of an 8-bit binary code. These texts are hidden in the colors, figuratively and literally.
The left image is the original image, with the right containing the secret message. Think you can see it with your eye? Try to decode it with this link.
By asking chatGPT4.0 for a detailed explanation, we can better understand how it works.
User Input: Can you describe what steganography is and how it works? Make the explanation simple to understand.
ChatGPT4.0 Output:
“Steganography is the art of hiding information within non-secret files or media to prevent the detection of the hidden information, distinguishing it from cryptography, which obscures information but doesn’t hide its existence. The process involves embedding data (like a text message or another file) within a carrier file, such as an image, audio, video, or text file, in a way that is not obvious to an observer. This carrier file should not appear altered or suspicious after embedding the secret data, ensuring the method resists attempts at steganalysis, which is the effort to detect hidden information.
Several techniques are employed in steganography. The Least Significant Bit (LSB) Insertion technique, for example, alters the least significant bits of an image’s pixels to encode data, making the changes nearly imperceptible to the human eye. More advanced methods, such as masking and filtering, embed information in more significant areas of the carrier, integrating it more deeply and making it less susceptible to loss through compression or manipulation. In audio steganography, redundant pattern encoding modifies patterns within the carrier to encode information. Cryptographic steganography adds an extra layer of protection by encrypting the message before embedding it. There are also text-based methods that adjust spacing, use synonyms, or alter punctuation to subtly encode information.
Steganography has various applications, including confidential communication, where it enables sensitive information to be transmitted without drawing attention. It’s also used in protecting intellectual property, covert operations for espionage, and in digital forensics and security to track unauthorized file sharing.
Detecting steganography, known as steganalysis, involves looking for anomalies or statistical irregularities in suspected carrier files. The limitations of steganography include the risk of the carrier file being altered or corrupted, which could destroy the hidden data, and the challenge of hiding large amounts of data without detection. As technology progresses, the techniques for both steganography and steganalysis continue to advance, creating a continuous cycle of innovation in the field.”
The work done by ChatGPT4.0 is clearly labeled, and the rest of the information is from the notes. The chatGPT4.0 output is just to ensure proper information is provided with more details and information.