The running key cipher is based on
A.
Modular arithmetic
B.
XOR mathematics
C.
Factoring
D.
Exponentiation
Explanation:
A: The use of modular mathematics and the representation of each letter by its numerical place in the alphabet are the key to many modern ciphers including running key ciphers. Page 331.
Running key cipher = is a type of polyalphabetic substitution cipher
The use of modular mathematics and the representation of each letter by its numerical place in the alphabet are the key to many modern ciphers including running key ciphers
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