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Cryptography
============

.. image:: https://pypip.in/version/cryptography/badge.svg?style=flat
    :target: https://pypi.python.org/pypi/cryptography/
    :alt: Latest Version

.. image:: https://readthedocs.org/projects/cryptography/badge/?version=latest
    :target: https://cryptography.io
    :alt: Latest Docs

.. image:: https://travis-ci.org/pyca/cryptography.svg?branch=master
    :target: https://travis-ci.org/pyca/cryptography

.. image:: https://img.shields.io/coveralls/pyca/cryptography/master.svg
    :target: https://coveralls.io/r/pyca/cryptography?branch=master


``cryptography`` is a package which provides cryptographic recipes and
primitives to Python developers.  Our goal is for it to be your "cryptographic
standard library". It supports Python 2.6-2.7, Python 3.2+, and PyPy.

``cryptography`` includes both high level recipes, and low level interfaces to
common cryptographic algorithms such as symmetric ciphers, message digests and
key derivation functions. For example, to encrypt something with
``cryptography``'s high level symmetric encryption recipe:

.. code-block:: pycon

    >>> from cryptography.fernet import Fernet
    >>> # Put this somewhere safe!
    >>> key = Fernet.generate_key()
    >>> f = Fernet(key)
    >>> token = f.encrypt(b"A really secret message. Not for prying eyes.")
    >>> token
    '...'
    >>> f.decrypt(token)
    'A really secret message. Not for prying eyes.'

You can find more information in the `documentation`_.

Discussion
~~~~~~~~~~

If you run into bugs, you can file them in our `issue tracker`_.

We maintain a `cryptography-dev`_ mailing list for development discussion.

You can also join ``#cryptography-dev`` on Freenode to ask questions or get
involved.


.. _`documentation`: https://cryptography.io/
.. _`issue tracker`: https://github.com/pyca/cryptography/issues
.. _`cryptography-dev`: https://mail.python.org/mailman/listinfo/cryptography-dev