03 Jan Practice Test Question – ROT 13
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ROT 13 is an example of what type of cipher?
A. Hashing
B. Transposition
C. Substitution
D. Cryptographically strong
Correct Answer: C
The ROT13 cipher exchanges each letter of a message for the letter that is 13 places ahead of it in the alphabet. This is an example of a substitution operation. Transposition ciphers rearrange the letters in a message, which is not occurring here. ROT13 is quite weak and would never be considered cryptographically strong. It also does not perform hashing of messages into message digests.
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