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Which of the following cipher is easiest to crack?

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in Data Structures & Algorithms II by (80.7k points)
Which of the following cipher is easiest to crack?

(a) vigenere cipher

(b) running key cipher

(c) trithemius cipher

(d) all are equally secure

I had been asked this question in examination.

My question comes from Cryptography in portion Cryptography of Data Structures & Algorithms II

1 Answer

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Best answer
Right answer is (c) trithemius cipher

The best explanation: Trithemius cipher is a special case of vigenere cipher and running key cipher is a variation of vigenere cipher. If one figures out that the cipher being used is trithemius then it is very easy to crack, unlike running key and vigenere ciphers as these use a secret key for encryption.

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