Signals Intelligence

Authored by: Julian Richards

Routledge Companion to Intelligence Studies

Print publication date:  August  2013
Online publication date:  September  2013

Print ISBN: 9780415507523
eBook ISBN: 9780203762721
Adobe ISBN: 9781134480296

10.4324/9780203762721.ch8

 Download Chapter

 

Abstract

In considering the history of signals intelligence (SIGINT), it quickly becomes apparent that this particular element of the modern intelligence-gathering capability is intimately connected with another, much older science, in the shape of cryptography. In one sense, the history of modern SIGINT as we know it today can only have begun with the emergence of the first electronic methods for transmitting signals from one place to another. In 1838, Samuel Morse demonstrated the method for sending a series of pulses down a cable (these formed the basis of the Morse Code); five years later, work began on the first experimental telegraphic line, between Washington, DC, and Baltimore in the US. Thus began the method for sending messages over long distances, and the birth of cable telegraphy. As with many advances in science, the intelligence implications of this development were born almost simultaneously, as governments considered how to eavesdrop of their adversaries' telegraphic messages.

 Cite
Search for more...
Back to top

Use of cookies on this website

We are using cookies to provide statistics that help us give you the best experience of our site. You can find out more in our Privacy Policy. By continuing to use the site you are agreeing to our use of cookies.