Unveiling Steganography: Access Methods and Data Handling
Learning Objectives
At the end of the lesson, you will understand steganography, its access methods, and data handling techniques.
Items in this lesson
Learning Objectives
At the end of the lesson, you will understand steganography, its access methods, and data handling techniques.
What do you already know about steganography and how it handles data?
Introduction to Steganography
Steganography is the practice of concealing messages within other non-secret text or data.
Module 1: Access Methods
Access methods determine how data is hidden and retrieved. Key methods include spatial domain and frequency domain techniques.
Unit 1.1: Spatial Domain Techniques
Spatial domain methods embed data directly into the pixel values of an image.
Unit 1.2: Frequency Domain Techniques
Frequency domain techniques embed data within the transform coefficients of an image.
Module 2: Data Handling
Data handling in steganography involves encoding, embedding, extraction, and decoding processes.
Unit 2.1: Encoding and Embedding
Encoding transforms the message, while embedding places it into the carrier data.
Unit 2.2: Extraction and Decoding
Extraction retrieves hidden data, and decoding converts it back to its original form.
Write down 3 things you learned in this lesson.
Write down 2 things you want to know more about.
Ask 1 question about something you haven't quite understood yet.
