- published: 28 Sep 2015
- views: 618
Signals intelligence (often contracted to SIGINT) is intelligence-gathering by interception of signals, whether between people ("communications intelligence"—COMINT), whether involving electronic signals not directly used in communication ("electronic intelligence"—ELINT), or combinations of the two. As sensitive information is often encrypted, signals intelligence often involves the use of cryptanalysis. Also, traffic analysis—the study of who is signaling whom and in what quantity—can often produce valuable information, even when the messages themselves cannot be decrypted.
As a means of collecting intelligence, signals intelligence is a subset of intelligence collection management, which, in turn, is a subset of intelligence cycle management.
Intercepting written but encrypted communications, and extracting information, probably did not wait long after the development of writing. A simple encryption system, for example, is the Caesar cipher. Electronic interception appeared as early as 1900, during the Boer Wars. The Boers had captured some British radios, and, since the British were the only people transmitting at the time, no special interpretation of the signals was necessary.
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In the season, the month of April, the song written on sand vanishes.
At the bottom, it is a dark and endless tomorrow. to meet, to say goodbye under the blue sky.
The end of summer, I met the sea.
What is love if it just drifts away and it's gone?
What did I pray to the sun that I know I can't reach, and turn it to ashes?
I can't seem to end it,
so again I pick up the pieces of you that disappeared in the sand.
He sings the song written on the sand with his head down,
keeping his voice down, and underneath it...
The tears from the sky hit me. Everyone looks so happy.
You are not here by me on my left side. The breeze is in blue from last year.
I met you in early autumn.
The weight of sadness more then the weight of the pain.
Flowers blooms and flowers fall, but a flower is as it is a flower.
But also wish to change by tomorrow.