If you have a highly confidential data that you need to share with your friends, how would you send the file across without compromising on its security? One way is to embed the message in an image and send the encrypted image over. This form of data encryption is known as Steganography. Here are 3 tools that allow you to do so in Linux.
SecretLayer is a software that utilizes the Steganography concept and hide your confidential files/messages in an image so no one, apart from you and the intended recipent, know the existence of the message. Read more for the review and giveaway detail.