:orphan:

.. title:: BT_CTLR_FAST_ENC

.. option:: CONFIG_BT_CTLR_FAST_ENC

*Fast Encryption Setup*

Type: ``bool``

Help
====

Enable connection encryption setup in 3 connection intervals.
Peripheral will respond to Encryption Request with Encryption Response
in the same connection interval, and also, will respond with Start
Encryption Response PDU in the 3rd connection interval, hence
completing encryption setup in 3 connection intervals. Encrypted data
would be transmitted as fast as in 3rd connection interval from the
connection establishment.
Maximum CPU time in Radio ISR will increase if this feature is
selected.

Direct dependencies
===================

\ :option:`BT_CTLR_LE_ENC <CONFIG_BT_CTLR_LE_ENC>` && \ :option:`BT_CONN <CONFIG_BT_CONN>` && \ :option:`BT_LL_SW_SPLIT <CONFIG_BT_LL_SW_SPLIT>` && \ :option:`BT_CTLR <CONFIG_BT_CTLR>` && \ :option:`BT_HCI <CONFIG_BT_HCI>` && \ :option:`BT <CONFIG_BT>`

*(Includes any dependencies from ifs and menus.)*

Default
=======

- y if \ :option:`BT_HCI_RAW <CONFIG_BT_HCI_RAW>`

Kconfig definition
==================

.. highlight:: kconfig

At ``subsys/bluetooth/controller/Kconfig.ll_sw_split:375``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:34`` → ``subsys/Kconfig:9`` → ``subsys/bluetooth/Kconfig:240`` → ``subsys/bluetooth/controller/Kconfig:594``

Menu path: (Top) → Sub Systems and OS Services → Bluetooth → Bluetooth Controller → Advanced features

.. parsed-literal::

    config BT_CTLR_FAST_ENC
    	bool "Fast Encryption Setup" if \ :option:`BT_CTLR_ADVANCED_FEATURES <CONFIG_BT_CTLR_ADVANCED_FEATURES>`
    	default y if \ :option:`BT_HCI_RAW <CONFIG_BT_HCI_RAW>`
    	depends on \ :option:`BT_CTLR_LE_ENC <CONFIG_BT_CTLR_LE_ENC>` && \ :option:`BT_CONN <CONFIG_BT_CONN>` && \ :option:`BT_LL_SW_SPLIT <CONFIG_BT_LL_SW_SPLIT>` && \ :option:`BT_CTLR <CONFIG_BT_CTLR>` && \ :option:`BT_HCI <CONFIG_BT_HCI>` && \ :option:`BT <CONFIG_BT>`
    	help
    	  Enable connection encryption setup in 3 connection intervals.
    	  Peripheral will respond to Encryption Request with Encryption Response
    	  in the same connection interval, and also, will respond with Start
    	  Encryption Response PDU in the 3rd connection interval, hence
    	  completing encryption setup in 3 connection intervals. Encrypted data
    	  would be transmitted as fast as in 3rd connection interval from the
    	  connection establishment.
    	  Maximum CPU time in Radio ISR will increase if this feature is
    	  selected.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*