Editing Secure communication (section)

== History ==
In 1898, [[Nikola Tesla]] demonstrated a [[radio controlled]] boat in [[Madison Square Garden]] that allowed secure communication between [[transmitter]] and [[Radio receiver|receiver]].<ref>The schematics are illustrated in {{US patent|613809}} and describes "rotating [[coherer]]s".</ref>

One of the most famous systems of secure communication was the [[SIGSALY|Green Hornet]]. During WWII, [[Winston Churchill]] had to discuss vital matters with [[Franklin D. Roosevelt]]. In the beginning, the calls were made using a voice scrambler, as this was thought to be secure. When this was found to be untrue, engineers started to work on a whole new system, which resulted in the Green Hornet or [[SIGSALY]]. With the Green Hornet, any unauthorized party listening in would just hear [[white noise]], but the conversation would remain clear to authorized parties. As secrecy was paramount, the location of the Green Hornet was only known by the people who built it and Winston Churchill. To maintain secrecy, the Green Hornet was kept in a closet labeled <nowiki>'Broom Cupboard.''</nowiki> The Green Hornet used a [[one-time pad]]. SIGSALY was also never broken.<ref>{{Citation|last=Bauer|first=Craig|title=Philosophical Explorations of the Legacy of Alan Turing |chapter=The Early History of Voice Encryption|date=2017|chapter-url=http://dx.doi.org/10.1007/978-3-319-53280-6_7|series=Boston Studies in the Philosophy and History of Science |volume=324 |pages=159–187|place=Cham|publisher=Springer International Publishing|doi=10.1007/978-3-319-53280-6_7 |isbn=978-3-319-53278-3 |access-date=2021-10-23}}</ref>