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A to Z Information Security

VLAN(仮想ローカルエリアネットワーク):A to Z Information Security

VLAN: Building Separate Neighborhoods in a Network VLAN stands for "Virtual Local Area Network." It's like dividing one big network into smaller, separate groups — just like creating different neighborhoods inside a big city! What is a VLA…

URL Filtering(URLフィルタリング):A to Z Information Security

URL Filtering: The Internet's Security Guard URL Filtering is like having a security guard at the entrance of the internet who checks every website before letting you visit it. If a website is dangerous, the guard says "Stop! You can't go …

Token(トークン):A to Z Information Security

Token: Your Digital Ticket A token is like a special temporary ticket that proves you're allowed to do something. It's used in computer security to keep you logged in safely without sending your password over and over again! What is a Toke…

SSL/TLS(暗号化通信プロトコル):A to Z Information Security

SSL/TLS: The Secret Envelope for Your Information SSL and TLS are special technologies that protect your information when it travels across the internet. They're like putting your message in a locked envelope that only the right person can…

Rootkit(ルートキット):A to Z Information Security

Rootkit: The Invisible Spy in Your Computer A rootkit is a sneaky type of malware that hides deep inside your computer and makes itself invisible. It's like a burglar who not only breaks into your house but also erases all the security cam…

Quarantine(隔離):A to Z Information Security

Quarantine: Putting Sick Files in Isolation Quarantine in cybersecurity means putting suspicious or infected files in a safe, locked place where they can't cause harm. It's just like when sick people stay home so they don't make others sic…

Penetration Testing(ペネトレーションテスト):A to Z Information Security

Penetration Testing: Friendly Hackers Testing Your Security Penetration Testing (also called "Pen Testing") is when good guy hackers try to break into your computer system ON PURPOSE to find weak spots before bad guys do! What is Penetrati…

OAuth(オーオース):A to Z Information Security

OAuth: Lending Your Key Without Giving It Away OAuth is a special system that lets you share access to your information without giving away your password. It's like letting someone borrow your toy without giving them the key to your whole …

NIST(米国国立標準技術研究所):A to Z Information Security

NIST: The Rulebook Makers for Cybersecurity NIST stands for "National Institute of Standards and Technology." It's a special organization in the United States that creates important rules and guidelines to keep computers and information sa…

MITM(中間者攻撃):A to Z Information Security

MITM: The Sneaky Spy in the Middle MITM stands for "Man-in-the-Middle Attack." It's when a hacker secretly gets between you and the person you're talking to, listening to everything you say! What is a MITM attack? Imagine you want to send …

Log(ログ):A to Z Information Security

Log: The Computer's Diary A log is like a diary or journal that computers keep. It writes down everything that happens so we can look back and see what occurred! What is a log? Imagine you keep a diary where you write: "Monday 9:00 AM - Wo…

Kerberos(ケルベロス):A to Z Information Security

Kerberos: The Three-Headed Guard Dog Kerberos is a special system that checks if you are who you say you are when you log into a computer network. It's named after a three-headed dog from Greek mythology that guarded the gates of the under…

Jailbreak(ジェイルブレイク):A to Z Information Security

Jailbreak: Breaking Free from Rules Jailbreak means breaking out of the rules and restrictions on your device. It's like escaping from jail - that's why it's called "jailbreak!" What is jailbreak? When you buy a smartphone or tablet (like …

IDS(侵入検知システム):A to Z Information Security

IDS: The Security Alarm for Computers IDS stands for "Intrusion Detection System." It's like a burglar alarm for your computer network that watches for bad guys trying to break in! What is IDS? Imagine your house has a security alarm. If s…

Hacking(ハッキング):A to Z Information Security

Hacking: Breaking Into Computers Hacking is when someone breaks into a computer system without permission. It's like picking a lock to get into a house that isn't yours! What is hacking? A hacker is someone who tries to get into computers,…

GDPR(EU一般データ保護規則):A to Z Information Security

GDPR: Protecting Your Personal Information GDPR stands for "General Data Protection Regulation." It's a big, important rule that protects people's private information in Europe! What is GDPR? Imagine someone takes your photo, writes down y…

Firewall(ファイアウォール):A to Z Information Security

Firewall: A Guard at the Gate A firewall is like a security guard that stands at your computer's door and decides who can come in and who must stay out! What is a firewall? Imagine your house has a front gate with a security guard. The gua…

Exploit(エクスプロイト):A to Z Information Security

Exploit: Finding and Using Weak Spots An exploit is like finding a crack in a wall and sneaking through it! What is an exploit? Every computer program is made by people. Sometimes, people make mistakes when they build programs. These mista…

DNS(Domain Name System):A to Z Information Security

DNS: The Internet's Phone Book DNS stands for "Domain Name System." It's like a giant phone book for the internet that helps your computer find websites! What is DNS? Imagine you want to call your friend, but you only remember their name, …

Cryptography(暗号化):A to Z Information Security

Cryptography: Secret Codes to Keep Information Safe Cryptography is like writing in a secret code! It's a way to hide messages so that only certain people can read them. What is cryptography? Imagine you want to send a secret note to your …

Backdoor(バックドア):A to Z Information Security

Backdoor: A Secret Way In A backdoor is like a secret door that bad guys use to sneak into a computer! What is a backdoor? Imagine your house has a front door that you lock every night. But what if someone made a secret door in the back th…

Authentication(認証):A to Z Information Security

Authentication: Proving You Are Who You Say You AreAuthentication is like showing your ID card. It's how computers and websites check that you are really you!How does it work?When you want to use your computer or visit a website, you need …