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.. hazmat::
Backends
========
Getting a backend
-----------------
.. currentmodule:: cryptography.hazmat.backends
``cryptography`` was designed to support multiple cryptographic backends, but
consumers rarely need this flexibility. Starting with version 3.1 ``backend``
arguments are optional and the default backend will automatically be selected
if none is specified.
On older versions you can get the default backend by calling
:func:`~default_backend`.
.. function:: default_backend()
:returns: An object that provides at least
:class:`~interfaces.CipherBackend`, :class:`~interfaces.HashBackend`, and
:class:`~interfaces.HMACBackend`.
Individual backends
-------------------
.. toctree::
:maxdepth: 1
openssl
interfaces