What Is Cybersecurity

Part of the Security Fundamentals section of Coddy's Cybersecurity journey. Lesson 1 of 43.

Cybersecurity means protecting accounts and information from people who should not have access. You are Lumen Coffee's new security analyst. Start by checking the company:

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Look for these lines:

Lumen Coffee (lumen.test), 2026-10-20
People: 8 active, 0 disabled

Challenge

Easy

Ticket from Sam, IT lead

Welcome to Lumen! Before anything else, take a look at the company you'll protect. The command is already written for you: press Enter, then Check.

Try it yourself

Terminal

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All lessons in Security Fundamentals

1The First Alert

What Is CybersecurityStopping an Attack Log Lines Stolen Passwords Multi-Factor Authentication The CIA Triad Back for More

4Passwords

Long Passwords Common Passwords Password Spraying Morning Cleanup Credential Stuffing MFA Fatigue The Password Review

7Incident Response

Incident Response Contain, Don't Destroy What They Left Behind Recovery The Incident Report The Night Alert

2Phishing

Phishing Look-Alike Domains Who Clicked The Second Wave

5Email Attacks

Reply-To Dangerous Attachments Where an Email Came From The Invoice Queue Business Email Compromise Blocking a Sender Mailbox Rules The Phishing Reports

3Access Control

Groups Least Privilege Admin Rights The New Hire Leavers Shared Accounts Separation of Duties The Access Review

6Rules of the Job

Authorization No Hacking Back The Vendor's Call