セキュア通信の起源はいつ
One of the most famous systems of secure communication was the Green Hornet. During WWII, Winston Churchill had to discuss vital matters with Franklin D. Roosevelt. At first, the calls were made using a voice scrambler as this was thought to be secure. When this was found to be untrue the engineers started work on a whole new system which resulted in the Green Hornet or SIGSALY. With the Green Hornet, anyone unauthorized party listening in would just hear white noise while the conversation was 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> It is said that because the Green Hornet works by a one-time pad it cannot be beaten.
WWII