February 2015
Intermediate to advanced
200 pages
4h 48m
Japanese
Content preview from Bluetooth Low Energyをはじめよう
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Bluetooth Low Energyをはじめよう
あらゆるコネクションはセキュリティモード 1、レ ベ ル 1で そ の 寿 命 を ス タ ート さ せ る が 、そ
の後、暗号化またはデータ署名による任意のセキュリティモードへアップグレード可能だ。
暗 号 鍵をスイッチすることによってリンクをモード 1、レ ベ ル 3か ら モ ード 1 、レ ベ ル 2へダウ
ングレードすることは可能だが、低位層での暗号化を停止することはできないため、セキュ
リ テ ィモ ード 1、レ ベ ル 2からのダウングレードは不可能だ。このことは、重要なので知っ
て お い て ほしい 。
セキュリティモードと手 順
前のセクションで詳述したすべてのモードと手 順に加えて、GAPではセキュリティの 確
立と適用に関連したモードと手順が追加して定義されている。
こ の セ クション で は 、 モ ード という用語は、手順を行うため、あるいは手順を行っ
てもらうためにデバイスがスイッチできる一時的な状態という、本来の意味に戻っ
て使われる。
こ の セクション で は 、032ページ の「 セキュリティ・マネージャ（ SM）」の基本セットを補完し、
増強するセキュリティモードと手順を簡単に説明する。
• ボ ン デ ィング 不 可（Non-bondable）モ ード
このモードにいるデバイスはボンディング手順の開始を許さないが、ペアリング手順の
実行を許可するのは自由だ。このモードでは、デバイスが鍵を配付
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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.