Documentation and interfaces for serialization to RSA*Numbers representations.
diff --git a/docs/hazmat/primitives/interfaces.rst b/docs/hazmat/primitives/interfaces.rst
index d5ca59a..c27782e 100644
--- a/docs/hazmat/primitives/interfaces.rst
+++ b/docs/hazmat/primitives/interfaces.rst
@@ -491,6 +491,40 @@
.. attribute:: name
+
+Key Serialization
+-----------------
+
+.. class:: RSAPrivateNumbersSerialziation
+
+ .. versionadded:: 0.5
+
+ .. method:: rsa_private_numbers()
+
+ Serialize to an
+ :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateNumbers`
+ representation.
+
+ :returns: An
+ :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateNumbers`
+ instance.
+
+
+.. class:: RSAPublicNumberSerialization
+
+ .. versionadded:: 0.5
+
+ .. method:: rsa_public_numbers()
+
+ Serialize to an
+ :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicNumbers`
+ representation.
+
+ :returns: An
+ :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicNumbers`
+ instance.
+
+
Hash algorithms
~~~~~~~~~~~~~~~