CompTIA Security+ Question C-26

Which of the following concepts describes the use of a one way transformation in order to validate the integrity of a program?

A. Hashing
B. Key escrow
C. Non-repudiation
D. Steganography

Answer: A

Hashing refers to the hash algorithms used in cryptography. It is used to store data, such as hash tables and its main characteristics are: It must be one-way – it is not reversible. Variable-length input produces fixed-length output – whether you have two characters or 2 million, the hash size is the same. The algorithm must have few or no collisions – in hashing two different inputs does not give the same output.