Question

If we encrypt the following plain text using rail fence technique with depth 2, what will be the encrypted message?
Plain Text = DIFFICULTWAYLEADSTODESTINATION

• A. DFITUALASOETNTOIFCLWYEDTSAIN
• B. DFITUALASOETNDSAINFOCLWYEDT
• C. DFITUALAYETDTSIANSOETNTOIFCLW
• D. DFITUOIFCLWYEDTDSIANTALASOETN

Hint:

The rail fence cipher is a transposition cipher that rearranges the letters of the plain text in a zigzag pattern and reads it off row by row.

Answer 1

The Correct Option is D

The rail fence cipher works by writing the plain text in a zigzag pattern on a number of rails (depth), then reading it off row by row. For depth 2, we divide the message into two rails: \[ \text{Rail 1: D I F T U A L A S O E T N T O I F C L W Y E D T D S I A N T A L A S O E T N} \] Reading off row by row, we get the encrypted message: \[ \boxed{\text{DFITUOIFCLWYEDTDSIANTALASOETN}} \] Final Answer: \[ \boxed{D \, \text{DFITUOIFCLWYEDTDSIANTALASOETN}} \]