Fundamentals Of Information Systems Security May 2026

Identifying what assets you have, what threats they face, and how much you’re willing to spend to protect them.

Guaranteeing that data is accurate and has not been tampered with. If a bank balance changes without a transaction, the integrity is blown. Fundamentals of information systems security

Firewalls, VPNs, and Intrusion Detection Systems (IDS). Identifying what assets you have, what threats they

Because the most sophisticated firewall can be bypassed by a single employee clicking a phishing link, education remains a core fundamental. 3. Layers of Defense (Defense in Depth) Identifying what assets you have

Solid security never relies on a single "front door." Instead, it uses —a layered approach borrowed from medieval castle design: Physical Security: Locks, cameras, and biometric scanners.

Who gets in, and what can they do? Fundamentals dictate two key rules here: