最終更新:2022-08-15 (月) 07:46:17 (614d)  

BLE/アドレス
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プライバシー

  • Bluetooth LE supports a feature that reduces the ability to track a LE device over a period of time by changing the Bluetooth Device Address on a frequent basis.
  • In order for a device using the privacy feature to reconnect to known devices, the device address, referred to as the private address, must be resolvable by the other device.
  • The private address is generated using the device’s resolving identity key (IRK) exchanged during the bonding procedure.
  • The term “resolution” means a process used by a device to calculate the device Identity Address from the received private address and the IRK, while the state “resolved” is the successful result of a resolution.
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メモ

  • どちらか、または両方を特定のデバイスに設定することができる
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BLE/LL

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種類

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BLE/デバイスアドレス?

  • Devices are identified using a device address and an address type; the address type indicates either a public device address or a random device address.
  • A public device address and a random device address are both 48 bits in length.
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BLE/アイデンティティアドレス

  • A device's Identity Address is a Public Device Address or Random Static Device Address that it uses in packets it transmits.
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パブリックデバイスアドレス?

  • BR/EDRのデバイスアドレスと同じ
  • パブリックアドレスを使用するためには IEEE Registration Authority への登録が必要となります。
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ランダムデバイスアドレス?

  • GAPでは３つのカテゴリに分類
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スタティックアドレス (Static Address)

  • 単純な乱数
  • 起動している間は変化しない
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プライベートアドレス

  • 解決不能プライベートアドレス (Non-resolvable Private Address)
    • あまり使われない
  • 解決可能プライベートアドレス (Resolvable Private Address)
    • IRKと乱数から生成
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GAP

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参考




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