Which of the following application security testing techniques is implemented when an automated system generates random input data?

A.
Fuzzing

B.
XSRF

C.
Hardening

D.
Input validation

Explanation:
Fuzzing is a software testing technique that involves providing invalid, unexpected, or random data to as inputs to a computer program. The program is then
monitored for exceptions such as crashes, or failed validation, or memory leaks.
Incorrect Answers:
B: XSRF or cross-site request forgery applies to web applications and is an attack that exploits the web application’s trust of a user who known or is supposed to
have been authenticated. This is often accomplished without the user’s knowledge.
C: Hardening is the process of securing a system by reducing its surface of vulnerability. Reducing the surface of vulnerability typically includes removing
unnecessary functions and features, removing unnecessary usernames or logins and disabling unnecessary services.
D: Input validation is a defensive technique intended to mitigate against possible user input attacks, such as buffer overflows and fuzzing. Input validation checks
every user input submitted to the application before processing that input. The check could be a length, a character type, a language type, or a domain.

http://en.wikipedia.org/wiki/Fuzz_testing
http://en.wikipedia.org/wiki/Cross-site_request_forgery
http://en.wikipedia.org/wiki/Hardening_%28computing%29
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, Sixth Edition, Sybex, Indianapolis, 2014, pp 218, 335
Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, p 229,