Computer Security -

Protecting a computer system requires a "defense-in-depth" approach—using multiple layers of security so that if one fails, others are still standing. Standard tools include firewalls to block suspicious traffic, antivirus software to catch malware, and encryption to scramble data so it's unreadable if stolen. However, technology alone isn't enough. Regular software updates, the use of strong passwords, and multi-factor authentication (MFA) are essential daily habits for anyone using a digital device.

If you've ever taken a computer security class, you've probably learned about the three legs of computer security—confidentiality, Schneier on Security - COMPUTER SECURITY

Ensuring that systems and data are ready and usable when authorized users need them. Regular software updates, the use of strong passwords,

CIA Triad, Malware, Social Engineering, Encryption, Defense-in-Depth. You can find deeper dives into these topics

You can find deeper dives into these topics in the Schneier on Security Essays or academic samples at IvyPanda and EduBirdie . Essays – Schneier on Security

The "enemies" of computer security are constantly evolving. What started as simple viruses designed to annoy users has turned into a global industry of cybercrime. Hackers now use sophisticated tools like ransomware , which locks a user's files until a payment is made, and phishing , which tricks people into giving away their passwords through fake emails. Furthermore, "social engineering" attacks target the weakest link in any security chain: the human. By manipulating someone into revealing a secret, an attacker can bypass even the most expensive digital locks.