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

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dby swapping adjacent letters

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Rail fence cipher is an example of ___________


amono-alphabetic cipher

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bpoly-alphabetic cipher

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ctransposition cipher

✓


dadditive cipher

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View Answer transposition cipher

What is the alternative name given to Rail fence cipher?


arandom cipher

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bmatrix cipher

✖


czig zag cipher

✓


dcolumnar cipher

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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

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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

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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

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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

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bDERSAC

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cREDSAC

✓


dSEDRAC

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View Answer REDSAC

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


atrue

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bfalse

✓


cA & B

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dNone of the above

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View Answer false

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


atrue

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bfalse

✓


cA & B

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d None of the above

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View Answer false

Route cipher is closely related to?


aAutokey cipher

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bHill cipher

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cRail fence cipher

✓


dColumnar transposition cipher

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View Answer Rail fence cipher

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