Fighting fire with fire

Computing

Security

The process of encoding data or a message so that it cannot be understood by anyone other than its intended recipient

Which of the following is the most accurate description of encryption?

By blocking any input that comes via the web

By ensuring that only correct data is input

By ensuring that programmers do not use SQL when designing a database

By including code that removes any SQL commands from the input data, preventing a hacker from gaining control of the database

How does input sanitisation tackle SQL injection?

Checking individual subprograms, subroutines, classes, or procedures in a program

Giving a number value to a key: each plain text letter is replaced by a new letter, the one found at the original letter's position in the alphabet plus or minus the value of the key

The use of an algorithm to use two keys: a public key and a private key

Which of the following definitions describes asymmetric encryption?

A type of malware that can be combated by constantly updating software

Self-replicating malware that does not need to infect an existing program but is able to spread very rapidly, infecting large numbers of machines

Self-replicating malware that usually embeds itself into an existing software on a device and then, once that software is run, spreads to other executable files

Which of the sentences below most accurately represents a worm?

Which of the sentences below most accurately represents a virus?

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