A java application which takes a file as input and hides it in an image by bit manipulation of RGB and decrypts the text information from the image, has been containerized using Dockerfile.
- Openjdk (official)
Pull Docker image and run:
For source:
docker pull arvindrvs21/encryp_source
docker create -v Data:/svol --name=svol source
docker cp test.png note.txt svol:/svol/
docker start svol
docker svol:/svol/Output.png .
For destination:
docker pull arvindrvs21/encryp_dest
docker run --name=dvol --volumes-from svol dest
(For this command to work create svol volume from source commands)
docker cp dvol:/svol/Output.png . (Only when source and destination are run in same system : It is a checking process)
docker cp Output.png dvol:/svol/
docker start dvol
docker dvol:/svol/myfile.txt .
There are 2 docker containers one for encryption while the other for decryption. Both containers are built from the Openjdk (official) image. Both these containers use a shared volume for storing the original and encypted image along with the encrypted and decrypted message. The output files are written inside a volume, from which the file can be copied to the host system using docker cp command.
The application initially copies the last bit of B values in RGB of image and writes it to the last bit of R. It then reads the input file character by character and XOR the value with the last bit of B thereby hiding the image. A 0 value in G indicates that ending of the message.
test.png - Initial image in which information is gonna be hidden
note.txt - Data which is hidden inside test.png
Output.png - Encrypted image after hiding the data
myfile.txt - Decrypted data from Output.png image