As far as I am aware, a radio signal is basically just shouting into the void, and anyone who is tuned to the correct channel can hear you clear as day, like a car radio. So, how do militaries keep their radio signals from being over heard by the enemy? Do they have special radios, or are the communications sent over radios just not that important strategically?
In: Technology
Lots of the communication out there, both military and civilian, are encrypted.
Basic encryption can just be taking a single word and shifting all the letters over by one. ONE > POF. The encryption used in communications takes this concept to a manageable extreme.
So long as both sides know what was used to encrypt the message, they can decrypt the message. POF > ONE.
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