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Architecture
============
.. warning::
Because ``cryptography`` is so young, much of this document is
aspirational, rather than documentation.
``cryptography`` has three different layers:
* ``cryptography``: This package contains higher level recipes, for example
"encrypt and then MAC". This is implemented on top of
``cryptography.hazmat.primitives``.
* ``cryptography.hazmat.primitives``: This packages contains low level
algorithms, things like ``AES`` or ``SHA1``. This is implemented on top of
``cryptography.hazmat.bindings``.
* ``cryptography.hazmat.bindings``: This package contains bindings to low level
cryptographic libraries. Our initial target will be OpenSSL.
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