Disappearing Cryptography, 3rd Edition

Chapter 17. Steganalysis

17.1. Code Words

Authors of recommendation letters often add a secret layer of meaning hidden beneath the surface of a letter that is ostensibly positive.

• All of his colleagues are astounded by his scrupulous attention to detail and the zeal with which he shares this information.
• Let us just say that his strength is his weakness.
• Bold words and sweeping statements are his friend.
• We continue to be amazed by his ability to whip off articles, journal papers, and conference talks with such a minimal time in the lab.
• This candidate is a master of the art of not saying what he means. He slips quickly between two-faced disinformation and carefully worded calumny.

17.2. Finding Hidden Messages

Many of the techniques in ...