Bảo mật
What is Malware? Classification, Characteristics, and Prevention
Malware is malicious software designed to infiltrate, damage, or steal data. Learn about 12 common types of malware and effective prevention solutions.
What is DDoS? Signs, Response and Effective Prevention Methods
DDoS (Distributed Denial of Service) is a distributed denial-of-service attack that uses botnets to send massive traffic to overload target systems. Learn the signs and how to prevent it.
What is Phishing? Recognizing and Preventing Online Fraud
Phishing is a Social Engineering attack that tricks users into revealing sensitive information via fake emails, spoofed websites, or SMS. Learn how to recognize phishing, IDN homograph attacks, and protect with SPF/DKIM/DMARC.
What is DNS Sinkhole? Applications and How to Use DNS Sinkhole Technique
DNS Sinkhole is a cybersecurity technique that redirects malicious DNS queries to a controlled IP address, preventing malware from connecting to C&C servers and protecting systems.
What is OAuth 2.0? Authorization and Login with Google/GitHub
OAuth 2.0 is an open authorization protocol (RFC 6749) that lets third-party applications access user resources on another service without knowing their password. Learn the Authorization Code Flow, 4 roles, scopes, and how Google/GitHub login works under the hood.
What is a Trojan? Essential Information About Trojan Malware
Learn what a Trojan is, how it works, common types (Backdoor, Rootkit, Banker, Downloader), signs of infection, and effective prevention measures.
What Is Zero Trust? The 'Never Trust, Always Verify' Security Model
Zero Trust is a modern security model built on 'Never trust, always verify.' Learn about its core principles, architecture, Google BeyondCorp, Cloudflare Access, and how to adopt it step by step.
What is VPN? Virtual Private Network, WireGuard and OpenVPN
VPN (Virtual Private Network) creates an encrypted tunnel between your device and the VPN server, protecting traffic and hiding your real IP address. Learn how WireGuard and OpenVPN work, and when to use VPN instead of a Proxy.
What Is MFA? Multi-Factor Authentication vs 2FA Explained
MFA (Multi-Factor Authentication) uses multiple verification factors to protect accounts. Learn about the 3 factor categories, TOTP, FIDO2/WebAuthn, phishing-resistant MFA, and how to prevent MFA fatigue attacks.
What is a Firewall? Role and Functions in Network Security
A firewall is a network security system that prevents unauthorized access and protects internal networks. Learn about firewall types, how they work, and how to enable/disable them on Windows.