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Loading and saving keys requires the pyasn1 module. This module is imported as
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of pyasn1.

.. note::

    Storing public and private keys via the `pickle` module is possible.
    However, it is insecure to load a key from an untrusted source.
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        >>> der = base64.standard_b64decode(b64der)

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        :py:func:`rsa.prime.getprime`.

        *Introduced in Python-RSA 3.1*

    :param accurate: whether to enable accurate mode or not.
    :returns: (p, q), where p > q

    >>> (p, q) = find_p_q(128)
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        with similar signature.
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    :param nbits: the number of bits required to store ``n = p*q``.
    :param accurate: when True, ``n`` will have exactly the number of bits you
        asked for. However, this makes key generation much slower. When False,
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    :param poolsize: the number of processes to use to generate the prime
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        This requires Python 2.6 or newer.
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    :type exponent: int

    :returns: a tuple (:py:class:`rsa.PublicKey`, :py:class:`rsa.PrivateKey`)

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