Data Breaches in USA

1. Which company experienced the largest data breach in history, affecting over 3 billion user accounts?

• Microsoft

• Facebook

• Yahoo!

• LinkedIn

How did Russian hackers gain access to Yahoo’s database?

• They used phishing emails

• They exploited backdoors, stolen backups, and access cookies

• They installed malware on Yahoo’s website

• They hacked into Yahoo’s cloud servers

What was the main cause of the Microsoft Exchange Server breach in 2021?

• Weak passwords used by employees

• A third-party software vulnerability

• Four different zero-day vulnerabilities

• An insider attack by a former employee

What was the main issue that led to First American Financial Corp.’s data leak?

• A malware attack

• A phishing scam

• A website design flaw that didn’t require authentication

• A breach of cloud storage

What was one of the main security flaws that led to the Facebook breach in April 2021?

• A ransomware attack

• A vulnerability in the contact-syncing tool

• Employees reusing old passwords

• A breach in Facebook's advertising system

How were hackers able to scrape data from 700 million LinkedIn accounts in April 2021?

• They exploited LinkedIn’s API

• They used brute force attacks

• They created fake job postings

• They hacked into LinkedIn’s cloud servers

What key mistake did MySpace make that allowed 360 million user accounts to be compromised?

• Using outdated antivirus software

• Using an unsalted SHA-1 hash to encrypt passwords

• Storing user data on an unsecured cloud server

• Employees accidentally leaking login credentials

What was the primary method hackers used to breach Home Depot’s payment system in 2014?

• They sent phishing emails to customers

• They installed malware on the company’s point-of-sale (POS) systems

• They stole employee login credentials

• They hacked Home Depot’s website

What major flaw in Adobe’s security allowed 38 million credit card numbers to be stolen in 2013?

• The breach was caused by a phishing scam

• Adobe used the same encryption key for all users

• Hackers guessed user passwords through brute force attacks

• A third-party contractor leaked customer information

In 2014, which online retailer suffered a data breach that compromised 145 million user accounts?

• Amazon

• eBay

• Walmart

• Best Buy