The __________ was used as the standard field system by the British Army in World War I and was used by the U.S.Army and other Allied forces during World War II.
A)Caesar cipher
B)Playfair cipher
C)Hill cipher
D)Rail Fence cipher

Question

Quizplus · Accepted Answer

The Playfair cipher was used as the standard field system by the British Army in World War I and was also used by the U.S. Army and other Allied forces during World War II.

The __________ Was Used as the Standard Field System by the British