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diff --git a/docs/hazmat/primitives/interfaces.rst b/docs/hazmat/primitives/interfaces.rst
index edb24cd9..7fef1c13 100644
--- a/docs/hazmat/primitives/interfaces.rst
+++ b/docs/hazmat/primitives/interfaces.rst
@@ -102,3 +102,175 @@ Interfaces used by the symmetric cipher modes described in
 
         Exact requirements of the nonce are described by the documentation of
         individual modes.
+
+Asymmetric Interfaces
+~~~~~~~~~~~~~~~~~~~~~
+
+.. class:: RSAPrivateKey
+
+    .. versionadded:: 0.2
+
+    An `RSA`_ private key.
+
+    .. method:: public_key()
+
+        :return: :class:`~cryptography.hazmat.primitives.interfaces.RSAPublicKey`
+
+        An RSA public key object corresponding to the values of the private key.
+
+    .. attribute:: modulus
+
+        :type: int
+
+        The public modulus.
+
+    .. attribute:: public_exponent
+
+        :type: int
+
+        The public exponent.
+
+    .. attribute:: key_size
+
+        :type: int
+
+        The bit length of the modulus.
+
+    .. attribute:: p
+
+        :type: int
+
+        ``p``, one of the two primes composing the :attr:`modulus`.
+
+    .. attribute:: q
+
+        :type: int
+
+        ``q``, one of the two primes composing the :attr:`modulus`.
+
+    .. attribute:: d
+
+        :type: int
+
+        The private exponent.
+
+    .. attribute:: n
+
+        :type: int
+
+        The public modulus. Alias for :attr:`modulus`.
+
+    .. attribute:: e
+
+        :type: int
+
+        The public exponent. Alias for :attr:`public_exponent`.
+
+
+.. class:: RSAPublicKey
+
+    .. versionadded:: 0.2
+
+    An `RSA`_ public key.
+
+    .. attribute:: modulus
+
+        :type: int
+
+        The public modulus.
+
+    .. attribute:: key_size
+
+        :type: int
+
+        The bit length of the modulus.
+
+    .. attribute:: public_exponent
+
+        :type: int
+
+        The public exponent.
+
+    .. attribute:: n
+
+        :type: int
+
+        The public modulus. Alias for :attr:`modulus`.
+
+    .. attribute:: e
+
+        :type: int
+
+        The public exponent. Alias for :attr:`public_exponent`.
+
+
+Hash Algorithms
+~~~~~~~~~~~~~~~
+
+.. class:: HashAlgorithm
+
+    .. attribute:: name
+
+        :type: str
+
+        The standard name for the hash algorithm, for example: ``"sha256"`` or
+        ``"whirlpool"``.
+
+    .. attribute:: digest_size
+
+        :type: int
+
+        The size of the resulting digest in bytes.
+
+    .. attribute:: block_size
+
+        :type: int
+
+        The internal block size of the hash algorithm in bytes.
+
+
+Key Derivation Functions
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. class:: KeyDerivationFunction
+
+    .. versionadded:: 0.2
+
+    .. method:: derive(key_material)
+
+        :param key_material bytes: The input key material. Depending on what
+                                   key derivation function you are using this
+                                   could be either random material, or a user
+                                   supplied password.
+        :return: The new key.
+        :raises cryptography.exceptions.AlreadyFinalized: This is raised when
+                                                          :meth:`derive` or
+                                                          :meth:`verify` is
+                                                          called more than
+                                                          once.
+
+        This generates and returns a new key from the supplied key material.
+
+    .. method:: verify(key_material, expected_key)
+
+        :param key_material bytes: The input key material. This is the same as
+                                   ``key_material`` in :meth:`derive`.
+        :param expected_key bytes: The expected result of deriving a new key,
+                                   this is the same as the return value of
+                                   :meth:`derive`.
+        :raises cryptography.exceptions.InvalidKey: This is raised when the
+                                                    derived key does not match
+                                                    the expected key.
+        :raises cryptography.exceptions.AlreadyFinalized: This is raised when
+                                                          :meth:`derive` or
+                                                          :meth:`verify` is
+                                                          called more than
+                                                          once.
+
+        This checks whether deriving a new key from the supplied
+        ``key_material`` generates the same key as the ``expected_key``, and
+        raises an exception if they do not match. This can be used for
+        something like checking whether a user's password attempt matches the
+        stored derived key.
+
+.. _`RSA`: http://en.wikipedia.org/wiki/RSA_(cryptosystem)