Which of the following attacks requires the least amount of skill?

A.
Dictionary

B.
Shoulder surfing

C.
Social engineering

D.
Birthday

Explanation:
Shoulder surfing is the simplest form of snooping. The most novice of computer userscould look over the shoulder of her neighbor and obtain some type of sensitiveinformation. This is the reason that most applications and operating systems presentasterisks while a user is typing in his password: so that no one can easily obtainit through shoulder surfing.