Q: ROT13 and a Caesar cipher are examples of _______.
or
Q: A Caesar cipher and ROT13 are two instances of _______.
- substitution ciphers
- asymmetric encryption
- digital signatures
- steganography
Explanation: Examples of substitution ciphers include the ROT13 algorithm and the Caesar cipher. In these kinds of ciphers, each letter in the plaintext is changed to a different letter that is located either a certain number of places below or higher on the alphabet. The ROT13 cipher is a variant of the Caesar cipher in which the shift is set to 13 places. This cipher is often used for simple text obfuscation rather than for secure communication.
