May 2019
Beginner to intermediate
296 pages
6h 58m
Japanese
Content preview from IT用語図鑑 ビジネスで使える厳選キーワード256
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213
関連用語
用語に関連する話
用語の使用例
5
情 報 セ キュリティ（３要 素 ）
機密性とは？
アクセス権限を付与されたもの
だけに限定して閲覧、処理できる
ように適切に権限を付与し、暗号
化などが施された状態を機密性
が保たれていると言う。
完全性とは？
改ざんや破壊が行われておらず、
内容が正しい状態にあることを
完全性が保たれていると言い、不
正に書き換えられたり情報が失
われていないことを意味する。
可用性とは？
災害やシステムトラブル、サイバー
攻撃などによって発生するシス
テムが使えない状態を減らし、復
旧までの時間が短いことを可用
性が高いと言う。
セキュリティの C I A
情報の機密性 （Confidentiality）、完全性（Integrity）及び可用性（Availability）を
維 持 することを「 情 報 セキュリティ」と言 い 、頭 文 字 を 取って C I A と呼 ぶ 。この 3 要 素 を
すべて維持しなければ情報セキュリティとして不十分であり、リスクが発生しやすい状況だ
と 言 え る た め 、 3 要 素 に 基 づ い て チ ェック す ることで 漏 れ なく対 策 を 実 施 で きる 。
Keyword
190
▶
じ ょ う ほ う せ き ゅ り て ぃ（ 3 よ う そ ）
「抜けや漏れを防ぐには情報セキュリティの3要素に沿って考えよう。」
トレードオフ
……P110
暗号化と復号
……P201
電子署名
……P204
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.