Signals Intelligence by Alliances, Nations and Industries
80 стр., ISBN:
6200789258
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Many organizations, national or not, are responsible for communications security as well as SIGINT; the organization makes codes and ciphers that it hopes opponents cannot break. There is a synergy between the two components; there is a saying among cryptologists that no one is qualified to create a cipher unless they have successfully cryptanalyzed a cipher of equivalent complexity. Many US and allied SIGINT activities are considered Sensitive Compartmented Intelligence, and carry the special security marking, "HANDLE THROUGH COMINT CHANNELS ONLY", which is abbreviated as a suffix to the security classification. SECRET SIGINT material would be marked. For exceptionally sensitive TOP SECRET material, there might be an additional codeword, such as.
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