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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