Analysis of information sources in references of the Wikipedia article "Signals intelligence" in English language version.
{{cite web}}
: CS1 maint: numeric names: authors list (link){{cite web}}
: CS1 maint: numeric names: authors list (link)National Security Agency/Central Security Service > Signals Intelligence > Overview
As early as 1900 in the Boer War, the Royal Navy in South Africa appears to have used wireless sets inherited from the Royal Engineers to signal from the neutral port of Lourenco Marques 'information relative to the enemy' albeit in violation of international law. [...] This first use of radio for intelligence purposes depended, of course, on the inability of others to intercept the signals, but in 1900, only the British in that part of the world had any wireless capability.
As early as 1900 in the Boer War, the Royal Navy in South Africa appears to have used wireless sets inherited from the Royal Engineers to signal from the neutral port of Lourenco Marques 'information relative to the enemy' albeit in violation of international law. [...] This first use of radio for intelligence purposes depended, of course, on the inability of others to intercept the signals, but in 1900, only the British in that part of the world had any wireless capability.
{{cite web}}
: CS1 maint: numeric names: authors list (link)