.. hazmat::
.. 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`.
.. toctree:: :maxdepth: 1 openssl interfaces