Data Structures Algorithms-II MCQs

Page No. 126

Encryption in Rail fence cipher is done using _____________


aby arranging the letters in a zig zag fashion in a table


bby randomly arranging letters


cby arranging letters in vigenere table


dby swapping adjacent letters



Rail fence cipher is an example of ___________


amono-alphabetic cipher


bpoly-alphabetic cipher


ctransposition cipher


dadditive cipher


View Answer transposition cipher

What is the alternative name given to Rail fence cipher?


arandom cipher


bmatrix cipher


czig zag cipher


dcolumnar cipher


View Answer zig zag cipher

What will be the ciphered text if route cipher is used for encrypting the plain text “SANFOUNDRY” with a number of columns given to be 5 and route of reading is down the columns?


aSUANNDFROY


bSORAFUDYNN


cSNAUDNORFY


dSANFOUNDRY


View Answer SUANNDFROY

What will be the ciphered text if route cipher is used for encrypting the plain text “SANFOUNDRY” with number of columns given to be 5 and route from the bottom right anti clockwise?


aSUANNDFROY


bSORAFUDYNN


cYOFNASUNDRY


d SANFOUNDRY


View Answer YOFNASUNDRY

What will be the plain text corresponding to cipher text “SFNUFACT” if with number of columns are given to be 3 and route of reading is from the bottom right anti clockwise?


aFACTSFUN


bFACTFUNS


cFUNSFACT


dFUNFACTS


View Answer FUNFACTS

What will be the plain text corresponding to cipher text “RSEADC” if with the number of columns are given to be 3 and route of reading is down the columns?


aSACRED


bDERSAC


cREDSAC


dSEDRAC


View Answer REDSAC

Router cipher becomes less secure when we have to encrypt longer messages.


atrue


bfalse


cA & B


dNone of the above


View Answer false

Rail fence cipher is more secure as compared to route cipher?


atrue


bfalse


cA & B


d None of the above


View Answer false

Route cipher is closely related to?


aAutokey cipher


bHill cipher


cRail fence cipher


dColumnar transposition cipher


View Answer Rail fence cipher

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