Steganography

  1. Historical Overview of Steganography
    1. Ancient Techniques
      1. Hidden Tattoos
        1. Use in Ancient Greece
          1. Histiaeus and Aristagoras
            1. Scalp Tattooing Methods
            2. Wax Tablets
              1. Scraping and Rewriting Methods
                1. Demaratus Warning System
                  1. Roman Era Applications
                  2. Invisible Inks
                    1. Organic and Chemical Inks
                      1. Lemon Juice
                        1. Milk-Based Inks
                          1. Urine Applications
                          2. Heat and Light Activation
                            1. Thermal Revelation
                              1. UV Light Detection
                                1. Chemical Developers
                              2. Physical Concealment Methods
                                1. Hollow Objects
                                  1. Clothing and Fabric
                                    1. Food and Organic Materials
                                  2. Medieval and Renaissance Period
                                    1. Manuscript Techniques
                                      1. Marginal Annotations
                                        1. Illuminated Manuscripts
                                          1. Coded Illustrations
                                          2. Diplomatic Communications
                                            1. Papal Correspondence
                                              1. Royal Court Messages
                                                1. Trade Route Communications
                                              2. World Wars and Espionage
                                                1. World War I Techniques
                                                  1. Postal Censorship Evasion
                                                    1. Prisoner Communications
                                                      1. Military Intelligence
                                                      2. World War II Innovations
                                                        1. Microdots
                                                          1. Creation and Use
                                                            1. Detection and Countermeasures
                                                              1. German and Allied Applications
                                                              2. Null Ciphers
                                                                1. Concealment in Plain Text
                                                                  1. Acrostics and Patterning
                                                                    1. Newspaper and Letter Methods
                                                                    2. Photography-Based Methods
                                                                      1. Film Grain Manipulation
                                                                        1. Photographic Overlays
                                                                      2. Cold War Era
                                                                        1. Espionage Applications
                                                                          1. Dead Drop Communications
                                                                            1. Radio and Television Broadcasting
                                                                          2. The Digital Age
                                                                            1. Emergence of Digital Steganography
                                                                              1. Early Digital Methods
                                                                                1. Computer File Systems
                                                                                  1. Disk Storage Techniques
                                                                                  2. Proliferation with the Internet
                                                                                    1. Email Attachments
                                                                                      1. Web-Based Distribution
                                                                                        1. File Sharing Networks
                                                                                      2. Evolution of Carrier Media
                                                                                        1. Images
                                                                                          1. Digital Photography Growth
                                                                                            1. Image Format Standardization
                                                                                            2. Audio
                                                                                              1. Digital Audio Revolution
                                                                                                1. Streaming Media
                                                                                                2. Video
                                                                                                  1. Digital Video Formats
                                                                                                    1. Online Video Platforms
                                                                                                    2. Network Protocols
                                                                                                      1. Internet Protocol Evolution
                                                                                                        1. Packet-Switched Networks

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                                                                                                  1. Introduction to Steganography

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                                                                                                  3. Steganographic Techniques by Carrier Medium