Overview
Steganography is the art and science of hiding secret messages in such a way that only the intended recipients know of its existence. Mail++ is a free service for hiding confidential contents in images and sending these images via email over the Internet.  Contents consists of text messages, file attachments, web pages and even windows applications.  Images with hidden contents can be viewed with any conventional image viewer software.  They looked just like any other images and with no loss in image quality.

Mail++ aims to build virtual communities where people with similar interests can communicate and share secrets.  Only the targeted audience can retrieve the messages or contents.  There will be no fear of unwanted people reading your messages and contents hidden in the images.

An overview of Mail++ is shown in the figure below.  Secret contents are first encrypted into images before an email is sent to the recipient.  The contents in the image are viewed and accessed using PhotoViz.  PhotoViz is a freeware with a set of imaging tools to automatically fix common problems in digital photographs.  Downloaded PhotoViz at http://www.picsalive.com and install it. The recipient can send a reply to the sender using the Mail++ website.

Public or non-members of Mail++ can only send secret text messages (or Photo Messages).  Users are encouraged to join the Mail++ community as members.  Members have more benefits like encrypting more content types.  Members can further protect their messages and contents by requiring the recipient to enter a password. 

Overview of Mail++