More than 13,000 Conversos were put on trial during the first 12 years of the Spanish Inquisition. Hoping to eliminate ties between the Jewish community and Conversos, the Jews of Spain were expelled in 1492 ..
A second reason, specifically for using Morse Code during the Second World War, was encoding... Nowadays equipment exists to take an outgoing radio signal and automatically encrypt the data or voices during transmission, this is 'on-line' encryption...
Thereafter, code books and equipment were captured by raids on German weather ships and from captured U-boats. A team including Alan Turing used special purpose Bombes and early computers to break new German codes as they were introduced.