Considering the following key using a block of five characters, encryption of…
2017
Considering the following key using a block of five characters, encryption of the message "NETWORKING" using the Transposition Cipher is:
Plaintext : 5 4 3 2 1
Ciphertext : 1 2 3 4 5
- A.
GNIKROWTEN
- B.
OGWNTIEKNR
- C.
OWTENGNIKR
- D.
NREKTIWNOG
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Correct answer: C
The message "NETWORKING" is split into 5-character blocks: N-E-T-W-O and R-K-I-N-G. The key maps plaintext positions 5, 4, 3, 2, 1 to ciphertext positions 1, 2, 3, 4, 5. This completely reverses each block. Reversing NETWO gives OWTEN, and reversing RKING gives GNIKR. Combining them yields OWTENGNIKR.