Computer Science
Grade 9
20 min
Protecting Your Devices: Keeping Your Computer and Phone Secure
Learn how to protect devices from malware and viruses.
What you'll learn
- Identify at least three different types of personal information that should be kept private online, such as name, address, and passwords.
- Explain in their own words why using strong passwords (with a mix of letters, numbers, and symbols) is important for protecting their accounts.
- Apply at least two different strategies, such as not clicking on suspicious links and asking a trusted adult for help, to determine if an email or message is a potential phishing attempt.
- List two ways to keep their devices (like computers and phones) physically safe, such as keeping them in a secure location and not leaving them unattended in public.
Tutorial Preview
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Introduction & Learning Objectives
Learning Objectives
Identify at least three common digital threats, such as malware and phishing.
Articulate the criteria for a strong password and create one using a recommended method.
Explain the purpose and function of Two-Factor Authentication (2FA).
Analyze a suspicious email or message for signs of a phishing attempt.
Describe the importance of regular software updates for device security.
Define the core security principles of confidentiality, integrity, and availability (CIA Triad).
Ever had a friend's social media account get hacked and start sending weird messages? 😱 Let's learn how to stop that from happening to you!
In this chapter, we'll explore the basics of digital defense to protect your personal information on your computer and phone. You&#...
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Key Concepts & Vocabulary
TermDefinitionExample
MalwareShort for 'malicious software,' it's any software intentionally designed to cause damage to a computer, server, client, or computer network. It's a general term for viruses, spyware, ransomware, and more.You download a 'free' game from a sketchy website, but it secretly installs a keylogger that records everything you type, including your passwords.
PhishingA type of social engineering attack where an attacker sends a fraudulent message designed to trick a person into revealing sensitive information or to deploy malicious software.Receiving an email that looks like it's from your bank, asking you to 'verify your account' by clicking a link and entering your password on a fake website.
Two-Factor Authentication (2FA)...
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Core Syntax & Patterns
Password Strength Pattern
A strong password should have: 1. Length (12+ characters), 2. Complexity (uppercase, lowercase, numbers, symbols), and 3. Uniqueness (not used for other accounts).
Use this pattern whenever creating a new password for any account. A simple way to achieve this is the 'passphrase method': combine 3-4 random, unrelated words and add complexity (e.g., 'Correct!Horse-Battery-Staple9'). This is easier to remember than random characters but much harder for a computer to guess.
Principle of Least Privilege (PoLP)
Grant an application or user only the minimum levels of access – or permissions – necessary to perform its function.
When installing a new app on your phone, apply this principle. If a simple calculator app asks for permission t...
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Challenging
A student has the following digital habits: 1) Uses the same simple password 'Summer2024!' for all accounts. 2) Enables 2FA on their email. 3) Frequently connects to public Wi-Fi without a VPN. 4) Ignores software update notifications on their phone. Which of these habits represents the MOST critical security risk to all of their accounts?
A.Ignoring software updates, as it could lead to a device-level compromise.
B.Using public Wi-Fi, as it exposes their traffic.
C.Reusing a weak password, as a breach on one minor site could compromise their most important accounts.
D.Enabling 2FA, as it is too complicated to manage.
Challenging
A company's secret project files are stolen by a competitor, but the original files on the company's server are left untouched and unchanged. Which principle of the CIA Triad has failed, and which security measure from the tutorial would have been most effective at preventing this specific failure?
A.Integrity; Firewall
B.Confidentiality; Encryption
C.Availability; Software Updates
D.Confidentiality; Firewall
Challenging
An employee receives a phishing email disguised as a message from IT, asking them to log into a new 'secure portal' to update their password. The employee clicks the link and enters their current credentials. The company had recently conducted a security training on phishing. What was the ultimate root cause of this security breach?
A.The company's firewall failed to block the email.
B.The employee's password was not strong enough.
C.The company did not have Two-Factor Authentication (2FA) enabled.
D.The failure of the human element to apply their security training.
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Frequently asked questions
What grade level is "Protecting Your Devices: Keeping Your Computer and Phone Secure"?
Protecting Your Devices: Keeping Your Computer and Phone Secure is a Grade 9 Computer Science lesson on ExcelOS.
What will I learn in Protecting Your Devices: Keeping Your Computer and Phone Secure?
You'll be able to: Identify at least three different types of personal information that should be kept private online, such as name, address, and passwords; Explain in their own words why using strong passwords (with a mix of letters, numbers, and….
Is "Protecting Your Devices: Keeping Your Computer and Phone Secure" free to practice?
Yes. You can read the tutorial preview for free, and signing up for a free ExcelOS account unlocks the full tutorial and all practice questions with instant feedback.
How many practice questions are included with Protecting Your Devices: Keeping Your Computer and Phone Secure?
This lesson includes 27 practice questions across multiple difficulty levels, each with instant feedback and explanations.