Create a secret message

If we insert an plain text to PNG file, everyone who open the sourch of our PNG file can read our message. because our message unencrypt. Safely, if we encrypt our message before we inserting our message to PNG file.

Plain Message => Encrypt => Chiper Message + PNG file = PNG file(with encrypt message)

For encryption we can you every encryption algorithm.

you can use caesar algorthm for example in caesar
or use vigener
encrypt your message there, so you can sent your message safely.


After that all procces, you can post your PNG file in facebook Wall post. place your key in the text of wall post. make an agreement with your partner how to sent the key.


Please read the following post to understanding :
How to inserting text Message in PNG file.