最終更新:2022-08-15 (月) 07:46:17 (634d)
BLE/アドレス
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.
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
BLE/LL
種類
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.
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.
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。
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
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
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