#セキュリティ

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Deauthentication Attack Explained: How It Works and PMF Defense

A Deauthentication Attack (Deauth Attack) sends spoofed IEEE 802.11 Deauthentication management frames (subtype 0x0C) to...

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Ghidra Explained: NSA's Open-Source Reverse Engineering Suite

Ghidra is the reverse-engineering suite the NSA used internally for nearly two decades before releasing it as open sourc...

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Firewall Explained: Five Generations, Stateful Inspection, NGFW / WAF / Cloud SG

A firewall is an access-control device that blocks traffic that doesn't match its defined rules. From DEC SEAL (1988) to...

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ASM (Attack Surface Management): EASM, CAASM, DRPS Explained

ASM (Attack Surface Management) is the security discipline of continuously discovering, inventorying, prioritizing, and...

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Ransomware Explained: Mechanics, Incidents, and Defenses

Ransomware is malware that 'encrypts files and demands payment for the decryption key' — a model that traces back to the...

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Trojan Horse Explained: Malware Types, Delivery, and Defenses

A Trojan horse is malware that disguises itself as legitimate software so the user installs it voluntarily — unlike viru...

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DDoS Attacks Explained: Types, Mechanisms, and Defenses

DDoS (Distributed Denial of Service) is the attack of 'burying a target under floods of (often legitimate-looking) reque...

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Buffer Overflow Explained: Stack, Exploits, and Defenses

Buffer overflow — writing past the end of an allocated buffer and corrupting adjacent memory — is the classic C/C++ vuln...

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Kali Linux Explained: Pentest Distribution Toolkit

Kali Linux is a Debian-based 'attacker-optimized' Linux distribution maintained by Offensive Security (now OffSec), ship...

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HTTP/HTTPS

HTTP/HTTPS is the protocol that powers content delivery on the Web. This article covers the request/response model, meth...