Noiseless Steganography

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HEADSTEGA

Steganography Methodology

The frequent exchange of emails is widely popular and generates a high volume of traffic that allows communicating parties to establish a covert channel without a suspicious pattern. Thus, emails are an attractive steganographic carrier to transmit hidden messages. This was the motive for developing the Email-Headers-Based Steganography (Headstega) Methodology [24]. Headstega encodes a message then assigns it to steganographic carriers, e.g., recipient’s email addresses, names, or subject fields, to camouflage data. For example, Headstega can conceal a message in the primary and secondary message recipients’ addresses that are the “To” and “Cc” fields of an email respectively. In addition, the generated text ...