Over the course of history is humans have using symbols and characters to secretly pass along information. This abbreviated writing method is known as stenography and is a common technique seen in many different languages. In today’s world, we use stenography through cryptography. By encrypting digital data, it allows us to hide messages and conceal information within images. A common technique used to modify an image is known as LSB or modifying the least significant bit. In digital images, pixels represent the colors red, green and blue. For each color there is a value that ranges from 0 to 255 that corresponds with specific color shade. Any combination of these values can create any specific color. These combinations are stored in 8-digit codes known as bits. By modifying the least significant bit (LSB) the user can alter the binary values representing the color. After modifying multiple bits, an encoded text can be placed into the image without making it visible to the audience. The change within the image is so minuscule that the image retains its visual integrity. Therefore, the secret message imbedded in the image is imperceivable to the viewer. The image below illustrates how this subtle change in imaging is difficult to decipher from the blind eye.
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