Data Structures Algorithms-II MCQs

Page No. 122

Beaufort cipher is an example of ____________


amono-alphabetic cipher


bpoly-alphabetic cipher


ctransposition cipher


dadditive cipher



Vigenere cipher is harder to crack than autokey cipher.


a true


b false


cA & B


d None of the above


View Answer false

What will be the ciphered text if the string “SECRET” is given as input to the code of autokey cipher with keyword as “SANFOUNDRY”?


aKEPWSN


bEKWPSN


cEKWPSNFDED


dKEPWSNFDED


View Answer KEPWSN

In which of the following cipher the plain text and the ciphered text does not have same number of letters?


aaffine cipher


bautokey cipher


ccolumnar cipher


d additive cipher


View Answer autokey cipher

Autokey cipher is also known as?


avigenere cipher


bautoclave cipher


cauto key cipher


dauto cipher


View Answer autoclave cipher

What will be the plain text corresponding to cipher text “ZEYQC” if autokey cipher is used with keyword as “SANFOUNDRY”?


aINDIA


bWorld


cHELLO


dSECRET


View Answer HELLO

Autokey cipher is harder to crack than keyword cipher.


a True


bfalse


cA & B


d None of the above


View Answer True

Autokey cipher is closely related to ___________


aVigenere cipher


bHill cipher


cPlay fair cipher


dRotor cipher


View Answer Vigenere cipher

Which of the following correctly defines poly alphabetic cipher?


aa substitution based cipher which uses multiple substitution at different positions


ba substitution based cipher which uses fixed substitution over entire message


ca transposition based cipher which uses multiple substitution at different positions


da transposition based cipher which uses fixed substitution over entire message



Encryption in Autokey cipher is done using ___________


avigenere formula


bvigenere cycle


cvigenere table


dvigenere addition


View Answer vigenere table

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