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On Encrypting “thepepsiisintherefrigerator” using Vignere Cipher System using the keyword “HUMOR” we get cipher text-

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On Encrypting “thepepsiisintherefrigerator” using Vignere Cipher System using the keyword “HUMOR” we get cipher text-

(a) abqdnwewuwjphfvrrtrfznsdokvl

(b) abqdvmwuwjphfvvyyrfznydokvl

(c) tbqyrvmwuwjphfvvyyrfznydokvl

(d) baiuvmwuwjphfoeiyrfznydokvl

The question was posed to me in class test.

My doubt is from Substitution and Transposition Techniques topic in portion Classical Encryption Techniques of Cryptograph & Network Security

1 Answer

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Correct option is (b) abqdvmwuwjphfvvyyrfznydokvl

The explanation is: Cipher text:=   Ci = Pi + ki mod m (mod 26).

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