CompTIA Security+ Question E-35

Which of the following functions provides an output which cannot be reversed and converts data into a string of characters?

A. Hashing
B. Stream ciphers
C. Steganography
D. Block ciphers

Answer: A

Hashing refers to the hash algorithms used in cryptography. It is used to store data, such as hash tables one of its characteristics is that it must be one-way – it is not reversible.