Marcus Johnson

Cybersecurity Engineer

15 Years Experience
Marcus Johnson
Marcus Johnson is a Cybersecurity Engineer with 15 years of experience protecting enterprise systems and infrastructure. His deep expertise in computer architecture and security allows him to identify vulnerabilities at the system level and implement comprehensive security solutions. Marcus has worked on critical infrastructure protection, threat analysis, and security architecture design for organizations handling sensitive data and mission-critical operations.

Articles by Marcus Johnson

Incident Response Plan: Cybersecurity Emergency Guide

Computer Security Dec 22, 2025

Build an actionable incident response plan with SIEM queries, SOAR playbooks, backup scripts, and testing guidance. Implement improvements today.

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Multi-Factor Authentication (MFA): Setup and Best Practices

Computer Security Dec 22, 2025

Practical MFA setup for Google, Microsoft Entra, AWS and apps with code, Conditional Access examples, service-account guidance, and troubleshooting. S...

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Zero Trust Security: Modern Network Protection Strategy

Computer Security Dec 22, 2025

Practical Zero Trust Security guide with tools (Okta, OPA v0.50+, VMware NSX), examples, and troubleshooting. Start securing your network today.

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Encryption Basics: AES, RSA, and Modern Cryptography

Computer Security Dec 20, 2025

Dive into the fundamentals of encryption with AES, RSA, and modern techniques. Understand how they protect your data in a digital world. Complete guid...

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Penetration Testing Basics: Ethical Hacking Tutorial

Computer Security Dec 20, 2025

Dive into the world of ethical hacking with our comprehensive guide to penetration testing basics. Learn techniques, tools, and strategies today!

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Learn Advanced VPN Techniques: Split Tunneling & More

Computer Security Dec 16, 2025

Master advanced VPN techniques like split tunneling to enhance security and optimize your internet performance. Explore our complete guide now!

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DDR5 vs DDR4 RAM: Performance Comparison and Upgrade Guide

Computer Architecture Dec 04, 2025

Compare DDR5 vs DDR4 performance, compatibility, and upgrade steps. Get BIOS guidance, benchmark notes, and stability tips to decide — read the guide...

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Two-Factor Authentication (2FA): Complete Security Guide

Computer Security Dec 04, 2025

Practical 2FA implementations (Node.js, Python, WebAuthn), envelope encryption, bypass mitigations, and production hardening. Secure your apps now.

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Learning VPN Basics: A Beginner's Guide

Computer Security Sep 19, 2025

Learn VPN basics, WireGuard server setup, secure key practices, and performance testing. Follow step-by-step commands and secure your VPN today.

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Cybersecurity Basics: Protecting Yourself Online

Computer Security Jul 09, 2025

Learn practical cybersecurity basics, incident-response steps, and privacy tips. Follow the checklist and secure your digital life today.

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Buffer Overflow Attacks: Learning Guide for Beginners

Computer Security Jun 30, 2025

Learn buffer overflow concepts with runnable C examples, ASan/Valgrind detection, and concrete prevention steps. Test safely — get started now.

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