Data Structures Algorithms-II MCQs

Page No. 131

Running key cipher is an example of _______________


amono-alphabetic cipher

✖


bpoly-alphabetic cipher

✓


ctransposition cipher

✖


dadditive cipher

✖



What is the significance of indicator block in running key cipher?


ait helps in encryption

✖


bit strengthens the cipher

✖


cit gives information regarding the book/text from where the key is taken

✓


dit makes encryption easy

✖



What will be the plain text corresponding to ciphered text “BKC” if the bifid cipher is used for encryption with key as “KEY” and period 5?


aMSD

✖


bSRT

✖


cKVK

✓


d VVS

✖


View Answer KVK

What will be the plain text corresponding to cipher text “XKS” if the bifid cipher is used with key as “KEY” and period as 5?


aIND

✖


bUSA

✓


cRSA

✖


dAUS

✖


View Answer USA

What will be the ciphered text corresponding to “ALGORITHM” if bifid cipher is used for encryption with key as “KEY” with a period as 5?


aSBPISZTKZH

✖


bPLNSOWGKQM

✖


cSELFQEXBHM

✖


dYFSGWNFBW

✓


View Answer YFSGWNFBW

What will be the ciphered text corresponding to “SANFOUNDRY” if bifid cipher is used for encryption with key as “KEY” with period as 5?


aSBPISZTKZH

✖


b PLNSOWGKQM

✓


cSELFQEXBHM

✖


dYFSGWNFBW

✖


View Answer PLNSOWGKQM

Bifid square combines autokey square with transposition.


atrue

✖


bFalse

✓


cA & B

✖


d None of these

✖


View Answer False

Trifid cipher encrypts the plain text by using bifid cipher twice.


atrue

✖


bfalse

✓


cA & B

✖


d None of these

✖


View Answer false

Bifid cipher combines transposition with which of the following cipher?


aPolybius square cipher

✓


bPlayfair cipher

✖


cgronsfeld cipher

✖


dtrifid cipher

✖



Which of the following cipher uses polybius square?


abifid cipher

✓


bbeaufort cipher

✖


ctrithemius cipher

✖


dgronsfeld cipher

✖


View Answer bifid cipher

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