An Ultimately Secure Confidential Communication Method
(KIT STEGROUP)
This is an example of ultimately secure confidential communication method using Internet Webpages.
Let the two persons (Mr. A and Mr. B) in the following figure be close friends wanting to start secret communication. They have their own Homepages on the Internet. Mr. A has an image data (Woman painting), and Mr. B has another image data (Killer-Whale illustration). They already agreed to use a certain common key to embed/extract messages.
The communication goes like this.
1) A will first create a message text ("message"), and embed it in the Woman painting to produce a Woman stego image.
2) Then A upload that Woman image on his Homepage.
3) Soon, B will notice it, and download the Woman image.
4) B extracts the hidden message by using the key, and receive the secret message from A.
5) B create a reply message ("reply").
6) B replies A in just the same way by using the Killer-Whale image.
7) A receive B's reply.
A Webpage-based confidential communication
The most important point in this method is that no one can detect their secret communication because they use an ordinary Webpage media which is open to anyone on the Internet.
This communication method can be implemented by any steganography program including Qtech-HV v01. However, this version of the Qtech Hide & View lacks (actually, "inactivated") the key setting function (i.e., "Access Key" is inactivated). The only parameter which you can use for an embedding key is the "Complexity Threshold" value. So, the actual secrecy isn't so high.
(Updated: Mar. 5, 2008. by Eiji Kawaguchi)