How to create secret messages in photos with python

Today, I will show you how to apply encrypted skills, by hiding secret codes or secret messages in the photo Python. Steganography is a technique used for quite a long time. Since World War II, it has been used as a way of communication between allies and preventing information that has been revealed by enemies. I will show you how to do this with two different techniques, one technique related to Secret Key and the other.

Request

You install Python and then continue to install the two libraries below.

Setting

pip install steganocryptopy
pip install stegano

Note: If you use Linux, replace PIP to PIP3.

How to the secret message in the photo does not need the key

I will hide the text in the image without any encryption lock, so the recipient can decode and get hidden text very easy.

Advantage

The advantage of this is that it is very simple so you will not have to solve any troubles.

Disadvantages

Anyone can decode as long as they use the same library that you have used during the encryption process.

Syntax

from stegano import lsb
secret = lsb.hide(path_to_img, secret_msg)
secret.save(ecrypted_img_name)

You must have a sample image in your project folder to hide the notice, next we must provide the path to the prepared image.

For example

>>> from stegano import lsb
>>> secret = lsb.hide("sample.png", "Python is dangerous be careful")
>>> secret.save("sample_secret.png")

Note: Because the Sample.png file is in the same folder as the execution file .py, just write the image file name is enough. If the image file is different from the folder, you need to fully record the path.

Now if you look at the project folder, you will realize there is a new image with the name sample_secret.png. Looking at or looking closely, you don’t know where there are messages hidden in it, right?

Decode

Make sure the image has a hidden text in your project directory.

Syntax

>>> from stegano import lsb
>>>lsb.reveal(path_to_an_image)

For example

>>> from stegano import lsb
>>>lsb.reveal('sample_secret.png')
'Python is dangerous be careful'

Done, now we will go into the way of hiding text in the image with Secret Key.

How to hide text in images with Secret Key

I will hide the secret text along with an encryption lock to decipher it. Therefore, only the key can decode it.

Advantage

It is very safe because only those with the key can decipher it.

Disadvantages

When the encryption key is lost, the decoding process will be a bit complicated.

Syntax

>>>from steganocryptopy.steganography import Steganography
>>> Steganography.generate_key(path_to_key)
>>> encrypted = Steganography.encrypt(path_to_key, path_to_img, path_to_secretfile)
>>> encrypted.save(encrypted_imgname)

For example

Suppose I have a key file called keya file containing a hidden notice called Classified.us And the image is named Sample.png.

>>>from steganocryptopy.steganography import Steganography
>>> Steganography.generate_key("key")
>>> encrypted = Steganography.encrypt("key","sample.png",  "classified.us")
>>> encrypted.save("Secret.png")

Now when you run the above code, you will see a new image on your project folder Secret.png.

Decode

To decode the image, you will need a file key And your encrypted image.

Syntax

>>> from steganocryptopy.steganography import Steganography
>>> Steganography.decrypt(path_to_key, path_to_image)

For example

>>> from steganocryptopy.steganography import Steganography
>>> Steganography.decrypt("key", "Secret_img.png")
'Life is short you need Python\n'

Congratulations, you have just learned how to hide secret messages in the image, now don’t be afraid to share messages with your friends.