What is encryption? explain how encryption was used during both the boer wars and wwii and its effectiveness.

Encryption is the use of code words or other things such as a different language to transmit data that is able to be understood by only those that use it. An example was during World War II, Americans in the Pacific theater fighting against the Japanese brought Navajo speaking Native Americans to transmit data to other American forces. They did this because the Navajo language was completely unknown to the Japanese and weren't able to decipher the transmissions that they intercept.