List of Figures

• . Unilateral frequency distribution of a ciphertext
• . Ciphertext
• . Unilateral frequency distribution of English plaintext.
• . Two similar patterns.
• . Cleartext
• . A code for a homophonic cipher.
• . Homophonic ciphertext with code
• . Homophonic ciphertext
• . Framework for cryptographic communication
• . Framework for steganographic communication.
• . Two kinds of weak cryptosystems.
• . Parts of a stegosystem
• . Mimicry as the inverse of compression.
• . A perfect stegosystem.
• . A tough question for a computer.
• . Ambiguity in the matrix-representation.
• . Ambiguity illustrated by VENN-diagrams.
• . Results of SENSEVAL-2
• . VENN-diagram for the levels of abstraction for guitar.
• . A sample of WordNet's hyponymy-structure.
• . A Huffman-tree of words in a synset.
• . An example for relative entropy.
• . A context-free grammar
• . A systemic grammar
• . A text-sample of Winstein's system
• . Encoding a secret by Winstein's scheme.
• . The word-choice hash
• . An example of coinciding word-choices
• . A NICETEXT dictionary
• . A text-sample of Chapman's system
• . A text-sample of Wayner's system
• . A text-sample of Atallah's system
• . ANL trees as produced by Atallah's system
• . Comparison of schemes.
• . Disjunct synsets
• . How word-choices are assigned to blocks.
• . Blocking by Method I
• . Blocking by Method II
• . Splitting word-choices into atomic units.
• . Assigning Blocking-Methods to elements.
• . An exemplaric coding-scheme.
• . Encoding a secret
• . Decoding the secret again
• . Two kinds of ambiguity.