Question

Frequency analysis can be performed on polyalphabetic ciphers which makes it weak.
a. True
b. False

Answer 1

Frequency analysis can be performed on polyalphabetic ciphers which makes it weak is a true statement.

Explanation:

• Polyalphabetic cipher is a method in which we use multiple cipher alphabets. Frequency analysis on polyalphabetic ciphers is quite vulnerable and can easily break sometimes. So we can say that the frequency analysis can lead to a weaker polyalphabetic cipher.
• Therefore we use several other techniques that are not affected by the frequency analysis. One of the widely used polyalphabetic ciphers is the vigenere cipher which uses at most 26 ciphers alphabets to encipher any message.

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