Which attack method is being used when an attacker tries to compromise a network with an authentication system that uses only 4-digit numeric passwords and no username?

The correct answer is C. dictionary. In a dictionary attack, an attacker uses a predefined list of common passwords, often derived from dictionaries, wordlists, or combinations of characters, numbers, and symbols, to systematically guess passwords until finding the correct one. Since the authentication system in thi

Submitted by alyssa_d· Mar 6, 2026Security Concepts

Question

Options

Areplay
BSQL injection
Cdictionary
Dcross-site scripting

How the community answered

(24 responses)

B
8% (2)
C
88% (21)
D
4% (1)

Explanation

In a dictionary attack, an attacker uses a predefined list of common passwords, often derived from dictionaries, wordlists, or combinations of characters, numbers, and symbols, to systematically guess passwords until finding the correct one. Since the authentication system in this scenario uses 4-digit numeric passwords and no usernames, a dictionary attack can be employed by trying numerous combinations of common 4-digit numeric sequences (e.g., 0000, 1234, 9999) to gain unauthorized access.

Topics

#Password attacks#Brute-force attack#Dictionary attack#Authentication weaknesses

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