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Suppose we encode a text with a Vigenere Cipher using only a single letter as a keyword. Which of the following is true? Group of
Suppose we encode a text with a Vigenere Cipher using only a single letter as a keyword. Which of the following is true?
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The result is insecure, since the encryption is equivalent to that of a Caesar Shift Cipher.
The result is fairly secure since looking for repetitions of threeormore characters to determine keyword length will no longer work.
The result is only as secure as an arbitrary monoalphabetic substitution cipher, since it amounts to a single randomlyordered substitution.
The result is as secure as a monoalphabetic substitution cipher with homophones, since multiple ciphertext characters will be used to represent a single plaintext character, but not vice versa.
None of the above are true.
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