.. _reference-security-pbkdf2:

Logout Configuration

invalidate_session

**type**: ``boolean`` **default**: ``true``

By default, when users log out from any firewall, their sessions are invalidated.

This means that logging out from one firewall automatically logs them out from

all the other firewalls.

The ``invalidate_session`` option allows to redefine this behavior. Set this

option to ``false`` in every firewall and the user will only be logged out from

the current firewall and not the other ones.

Using the PBKDF2 Encoder: Security and Speed