TLDR: Image Steganography

Date: 2020-01-17 Source: https://arpitbhayani.me/blogs/image-steganography

Overview

Explore image steganography - Hide secret messages within images! Learn techniques, from LSB substitution to JPEG methods. Since the rise of the Internet, making communication more secure has been a priority.

Key Points

• Steganography and Cryptography: Since the rise of the Internet, making communication more secure has been a priority.
• Color depth and definition: An image is a collection of numbers that defines color intensities in different areas of the image.
• Compression: When working with high-resolution images with greater color depth, the size of the raw file can become big and it becomes impossible to transmit it over a standard internet connection.
• LSB Substitution: This technique converts the secret message/payload into a bitstream and substitutes them into a least significant bit (the 8th bit) of some or all bytes inside an image.