3t

Steganography

Signal Security

  • Communication Security
    1. Steganography (invisible inks, open codes, messages in hollow heels) and Transmission Security (spurt radio and spread spectrum systems)
    2. Cryptography(codes and ciphers
    3. Traffic security(call-sign changes, dummy messages, radio silence)

  • Electronic Security
    1. Emission Security (shifting of radar frequencies, spread spectrum)
    2. Counter-Countermeasures "looking through" (jammed radar)

Table 1: Kahn's Security Table

 

74

Defined

Signal Intelligence

  • Communication Intelligence
    1. Interception and direction-finding




    2. Cryptanalysis
    3. Traffic analysis (direction-finding, message-flow studies, radio finger printing)
  • Electronic Intelligence
    1. Electronic Reconnaissance (eaves-dropping on radar emissions)
    2. Countermeasures (jamming radar and false radar echoes)

Table 1: Kahn's Security Table

 


Next Section: 2.2 Steganography History


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