Multiple choice

In a certain encoding technique HELLO is replaced by JGNNQ and HELL is replaced by IFMM. Which type of substitution cipher has been used here?

  1. Polygram Substitution Cipher

  2. Caesar cipher

  3. Mono-alphabetic Cipher

  4. Homophonic Substitution Cipher

  5. None of these
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A Correct answer
Explanation

In polygran substitution cipher, rather than replacing one plain text alphabet with onr cipher text alphabet at a time, a block of alphabets is replaced with another block.

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