What will be the plain text corresponding to cipher text “IWRWHS” if running key cipher is used with keyword as “SANFOUNDRY”?(a) SECRET(b) QWERTY(c) INDIAN(d) FRIENDI got this question during an online interview.Origin of the question is Cryptography in portion Cryptography of Data Structures & Algorithms II

What will be the plain text corresponding to cipher text “IWRWHS”

1.	What will be the plain text corresponding to cipher text “IWRWHS” if running key cipher is used with keyword as “SANFOUNDRY”?(a) SECRET(b) QWERTY(c) INDIAN(d) FRIENDI got this question during an online interview.Origin of the question is Cryptography in portion Cryptography of Data Structures & Algorithms II
Answer» Right choice is (b) QWERTY Easy explanation - RUNNING KEY cipher is a TYPE of poly alphabetic SUBSTITUTION which uses tabula recta for MAKING substitutions in the plain text. Using the table we find the plain text to be “QWERTY”.

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